Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like PersonTrait often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use PersonTrait, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 15 | trait PersonTrait |
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| 16 | { |
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| 17 | private $_additionalName; |
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| 18 | |||
| 19 | /** |
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| 20 | * @return string |
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| 21 | */ |
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| 22 | public function getAdditionalName() |
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| 26 | |||
| 27 | /** |
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| 28 | * An additional name for a Person, can be used for a middle name. |
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| 29 | * |
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| 30 | * @param string $additionalName |
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| 31 | * @return PersonTrait |
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| 32 | */ |
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| 33 | public function setAdditionalName($additionalName) |
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| 38 | |||
| 39 | private $_address; |
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| 40 | |||
| 41 | /** |
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| 42 | * @return PostalAddress|string |
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| 43 | */ |
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| 44 | public function getAddress() |
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| 48 | |||
| 49 | /** |
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| 50 | * Physical address of the item. |
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| 51 | * |
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| 52 | * @param PostalAddress|string $address |
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| 53 | * @return PersonTrait |
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| 54 | */ |
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| 55 | public function setAddress(PostalAddress $address) |
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| 60 | |||
| 61 | private $_affiliation; |
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| 62 | |||
| 63 | /** |
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| 64 | * @return Organization |
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| 65 | */ |
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| 66 | public function getAffiliation() |
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| 70 | |||
| 71 | /** |
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| 72 | * An organization that this person is affiliated with. For example, a school/university, a club, or a team. |
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| 73 | * |
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| 74 | * @param Organization $affiliation |
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| 75 | * @return PersonTrait |
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| 76 | */ |
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| 77 | public function setAffiliation(Organization $affiliation) |
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| 82 | |||
| 83 | private $_award; |
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| 84 | |||
| 85 | /** |
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| 86 | * @return string |
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| 87 | */ |
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| 88 | public function getAward() |
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| 92 | |||
| 93 | /** |
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| 94 | * An award won by or for this item. |
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| 95 | * Supersedes awards. |
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| 96 | * |
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| 97 | * @param string $award |
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| 98 | * @return PersonTrait |
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| 99 | */ |
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| 100 | public function setAward($award) |
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| 105 | |||
| 106 | private $_birthDate; |
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| 107 | |||
| 108 | /** |
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| 109 | * @return string |
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| 110 | */ |
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| 111 | public function getBirthDate() |
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| 115 | |||
| 116 | /** |
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| 117 | * Date of birth. |
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| 118 | * |
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| 119 | * @param DateValue $birthDate |
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| 120 | * @return PersonTrait |
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| 121 | */ |
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| 122 | public function setBirthDate(DateValue $birthDate) |
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| 127 | |||
| 128 | private $_birthPlace; |
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| 129 | |||
| 130 | /** |
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| 131 | * @return Place |
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| 132 | */ |
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| 133 | public function getBirthPlace() |
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| 137 | |||
| 138 | /** |
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| 139 | * The place where the person was born. |
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| 140 | * |
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| 141 | * @param Place $birthPlace |
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| 142 | * @return PersonTrait |
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| 143 | */ |
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| 144 | public function setBirthPlace($birthPlace) |
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| 149 | |||
| 150 | private $_brand; |
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| 151 | |||
| 152 | /** |
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| 153 | * @return Brand|Organization |
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| 154 | */ |
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| 155 | public function getBrand() |
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| 159 | |||
| 160 | /** |
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| 161 | * The brand(s) associated with a product or service, or the brand(s) maintained by an organization or business person. |
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| 162 | * |
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| 163 | * @param Brand|Organization $brand |
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| 164 | * @return PersonTrait |
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| 165 | */ |
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| 166 | public function setBrand($brand) |
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| 171 | |||
| 172 | private $_children; |
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| 173 | |||
| 174 | /** |
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| 175 | * @return Person |
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| 176 | */ |
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| 177 | public function getChildren() |
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| 181 | |||
| 182 | /** |
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| 183 | * A child of the person. |
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| 184 | * |
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| 185 | * @param Person $children |
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| 186 | * @return PersonTrait |
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| 187 | */ |
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| 188 | public function setChildren(Person $children) |
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| 193 | |||
| 194 | private $_colleague; |
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| 195 | |||
| 196 | /** |
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| 197 | * @return Person |
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| 198 | */ |
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| 199 | public function getColleague() |
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| 203 | |||
| 204 | /** |
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| 205 | * A colleague of the person. |
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| 206 | * |
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| 207 | * Supersedes colleagues. |
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| 208 | * |
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| 209 | * @param Person $colleague |
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| 210 | * @return PersonTrait |
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| 211 | */ |
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| 212 | public function setColleague(Person $colleague) |
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| 217 | |||
| 218 | private $_contactPoint; |
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| 219 | |||
| 220 | /** |
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| 221 | * @return ContactPoint |
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| 222 | */ |
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| 223 | public function getContactPoint() |
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| 227 | |||
| 228 | /** |
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| 229 | * A contact point for a person or organization. |
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| 230 | * |
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| 231 | * Supersedes contactPoints. |
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| 232 | * |
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| 233 | * @param ContactPoint $contactPoint |
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| 234 | * @return PersonTrait |
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| 235 | */ |
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| 236 | public function setContactPoint(ContactPoint $contactPoint) |
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| 241 | |||
| 242 | private $_deathDate; |
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| 243 | |||
| 244 | /** |
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| 245 | * @return string |
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| 246 | */ |
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| 247 | public function getDeathDate() |
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| 251 | |||
| 252 | /** |
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| 253 | * Date of death. |
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| 254 | * |
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| 255 | * @param DateValue $deathDate |
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| 256 | * @return PersonTrait |
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| 257 | */ |
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| 258 | public function setDeathDate(DateValue $deathDate) |
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| 263 | |||
| 264 | private $_deathPlace; |
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| 265 | |||
| 266 | /** |
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| 267 | * @return Place |
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| 268 | */ |
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| 269 | public function getDeathPlace() |
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| 273 | |||
| 274 | /** |
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| 275 | * The place where the person died. |
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| 276 | * |
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| 277 | * @param Place $deathPlace |
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| 278 | * @return PersonTrait |
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| 279 | */ |
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| 280 | public function setDeathPlace(Place $deathPlace) |
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| 285 | |||
| 286 | private $_duns; |
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| 287 | |||
| 288 | /** |
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| 289 | * @return string |
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| 290 | */ |
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| 291 | public function getDuns() |
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| 295 | |||
| 296 | /** |
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| 297 | * The Dun & Bradstreet DUNS number for identifying an organization or business person. |
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| 298 | * |
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| 299 | * @param string $duns |
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| 300 | * @return PersonTrait |
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| 301 | */ |
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| 302 | public function setDuns(Person $duns) |
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| 307 | |||
| 308 | private $_email; |
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| 309 | |||
| 310 | /** |
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| 311 | * @return string |
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| 312 | */ |
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| 313 | public function getEmail() |
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| 317 | |||
| 318 | /** |
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| 319 | * Email address. |
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| 320 | * |
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| 321 | * @param string $email |
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| 322 | * @return PersonTrait |
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| 323 | */ |
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| 324 | public function setEmail($email) |
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| 329 | |||
| 330 | private $_familyName; |
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| 331 | |||
| 332 | /** |
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| 333 | * @return string |
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| 334 | */ |
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| 335 | public function getFamilyName() |
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| 339 | |||
| 340 | /** |
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| 341 | * Family name. In the U.S., the last name of an Person. |
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| 342 | * This can be used along with givenName instead of the name property. |
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| 343 | * |
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| 344 | * @param string $familyName |
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| 345 | * @return PersonTrait |
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| 346 | */ |
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| 347 | public function setFamilyName($familyName) |
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| 352 | |||
| 353 | private $_faxNumber; |
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| 354 | |||
| 355 | /** |
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| 356 | * @return string |
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| 357 | */ |
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| 358 | public function getFaxNumber() |
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| 362 | |||
| 363 | /** |
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| 364 | * The fax number. |
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| 365 | * |
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| 366 | * @param string $faxNumber |
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| 367 | * @return PersonTrait |
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| 368 | */ |
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| 369 | public function setFaxNumber($faxNumber) |
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| 374 | |||
| 375 | private $_follows; |
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| 376 | |||
| 377 | /** |
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| 378 | * @return Person |
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| 379 | */ |
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| 380 | public function getFollows() |
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| 384 | |||
| 385 | /** |
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| 386 | * The most generic uni-directional social relation. |
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| 387 | * |
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| 388 | * @param Person $follows |
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| 389 | * @return PersonTrait |
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| 390 | */ |
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| 391 | public function setFollows(Person $follows) |
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| 396 | |||
| 397 | private $_funder; |
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| 398 | |||
| 399 | /** |
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| 400 | * @return Organization|Person |
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| 401 | */ |
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| 402 | public function getFunder() |
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| 406 | |||
| 407 | /** |
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| 408 | * A person or organization that supports (sponsors) something through some kind of financial contribution. |
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| 409 | * |
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| 410 | * @param Organization|Person $funder |
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| 411 | * @return PersonTrait |
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| 412 | */ |
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| 413 | View Code Duplication | public function setFunder($funder) |
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| 420 | |||
| 421 | private $_gender; |
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| 422 | |||
| 423 | /** |
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| 424 | * @return GenderType|string |
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| 425 | */ |
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| 426 | public function getGender() |
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| 430 | |||
| 431 | /** |
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| 432 | * Gender of the person. While http://schema.org/Male and http://schema.org/Female may be used, |
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| 433 | * text strings are also acceptable for people who do not identify as a binary gender. |
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| 434 | * |
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| 435 | * @param GenderType|string $gender |
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| 436 | * @return PersonTrait |
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| 437 | */ |
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| 438 | public function setGender($gender) |
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| 443 | |||
| 444 | private $_givenName; |
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| 445 | |||
| 446 | /** |
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| 447 | * @return string |
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| 448 | */ |
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| 449 | public function getGivenName() |
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| 453 | |||
| 454 | /** |
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| 455 | * Given name. In the U.S., the first name of a Person. |
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| 456 | * This can be used along with familyName instead of the name property. |
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| 457 | * |
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| 458 | * @param string $givenName |
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| 459 | * @return PersonTrait |
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| 460 | */ |
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| 461 | public function setGivenName($givenName) |
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| 466 | |||
| 467 | private $_globalLocationNumber; |
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| 468 | |||
| 469 | /** |
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| 470 | * @return string |
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| 471 | */ |
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| 472 | public function getGlobalLocationNumber() |
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| 476 | |||
| 477 | /** |
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| 478 | * The Global Location Number (GLN, sometimes also referred to as International Location Number or ILN) |
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| 479 | * of the respective organization, person, or place. |
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| 480 | * The GLN is a 13-digit number used to identify parties and physical locations. |
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| 481 | * |
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| 482 | * @param string $globalLocationNumber |
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| 483 | * @return PersonTrait |
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| 484 | */ |
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| 485 | public function setGlobalLocationNumber($globalLocationNumber) |
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| 490 | |||
| 491 | private $_hasPOS; |
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| 492 | |||
| 493 | /** |
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| 494 | * @return Place |
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| 495 | */ |
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| 496 | public function getHasPOS() |
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| 500 | |||
| 501 | /** |
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| 502 | * Points-of-Sales operated by the organization or person. |
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| 503 | * |
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| 504 | * @param Place $hasPOS |
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| 505 | * @return PersonTrait |
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| 506 | */ |
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| 507 | public function setHasPOS($hasPOS) |
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| 512 | |||
| 513 | private $_height; |
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| 514 | |||
| 515 | /** |
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| 516 | * @return Distance|QuantitativeValue |
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| 517 | */ |
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| 518 | public function getHeight() |
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| 522 | |||
| 523 | /** |
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| 524 | * The height of the item. |
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| 525 | * |
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| 526 | * @param Distance|QuantitativeValue $height |
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| 527 | * @return PersonTrait |
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| 528 | */ |
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| 529 | public function setHeight($height) |
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| 534 | |||
| 535 | private $_homeLocation; |
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| 536 | |||
| 537 | /** |
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| 538 | * @return ContactPoint|Place |
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| 539 | */ |
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| 540 | public function getHomeLocation() |
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| 544 | |||
| 545 | /** |
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| 546 | * A contact location for a person's residence. |
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| 547 | * |
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| 548 | * @param ContactPoint|Place $homeLocation |
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| 549 | * @return PersonTrait |
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| 550 | */ |
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| 551 | public function setHomeLocation($homeLocation) |
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| 556 | |||
| 557 | private $_honorificPrefix; |
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| 558 | |||
| 559 | /** |
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| 560 | * @return string |
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| 561 | */ |
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| 562 | public function getHonorificPrefix() |
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| 566 | |||
| 567 | /** |
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| 568 | * An honorific prefix preceding a Person's name such as Dr/Mrs/Mr. |
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| 569 | * |
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| 570 | * @param string $honorificPrefix |
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| 571 | * @return PersonTrait |
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| 572 | */ |
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| 573 | public function setHonorificPrefix($honorificPrefix) |
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| 578 | |||
| 579 | private $_honorificSuffix; |
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| 580 | |||
| 581 | /** |
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| 582 | * @return string |
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| 583 | */ |
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| 584 | public function getHonorificSuffix() |
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| 588 | |||
| 589 | /** |
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| 590 | * An honorific suffix preceding a Person's name such as M.D. /PhD/MSCSW. |
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| 591 | * |
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| 592 | * @param string $honorificSuffix |
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| 593 | * @return PersonTrait |
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| 594 | */ |
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| 595 | public function setHonorificSuffix($honorificSuffix) |
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| 600 | |||
| 601 | private $_isicV4; |
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| 602 | |||
| 603 | /** |
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| 604 | * @return string |
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| 605 | */ |
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| 606 | public function getIsicV4() |
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| 610 | |||
| 611 | /** |
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| 612 | * The International Standard of Industrial Classification of All Economic Activities (ISIC), |
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| 613 | * Revision 4 code for a particular organization, business person, or place. |
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| 614 | * |
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| 615 | * @param string $isicV4 |
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| 616 | * @return PersonTrait |
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| 617 | */ |
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| 618 | public function setIsicV4($isicV4) |
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| 623 | |||
| 624 | private $_jobTitle; |
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| 625 | |||
| 626 | /** |
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| 627 | * @return string |
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| 628 | */ |
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| 629 | public function getJobTitle() |
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| 633 | |||
| 634 | /** |
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| 635 | * The job title of the person (for example, Financial Manager). |
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| 636 | * |
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| 637 | * @param string $jobTitle |
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| 638 | * @return PersonTrait |
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| 639 | */ |
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| 640 | public function setJobTitle($jobTitle) |
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| 645 | |||
| 646 | private $_knows; |
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| 647 | |||
| 648 | /** |
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| 649 | * @return Person |
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| 650 | */ |
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| 651 | public function getKnows() |
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| 655 | |||
| 656 | /** |
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| 657 | * The most generic bi-directional social/work relation. |
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| 658 | * |
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| 659 | * @param Person $knows |
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| 660 | * @return PersonTrait |
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| 661 | */ |
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| 662 | public function setKnows(Person $knows) |
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| 667 | |||
| 668 | private $_makesOffer; |
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| 669 | |||
| 670 | /** |
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| 671 | * @return Offer |
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| 672 | */ |
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| 673 | public function getMakesOffer() |
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| 677 | |||
| 678 | /** |
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| 679 | * A pointer to products or services offered by the organization or person. |
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| 680 | * Inverse property: offeredBy. |
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| 681 | * |
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| 682 | * @param Offer $makesOffer |
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| 683 | * @return PersonTrait |
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| 684 | */ |
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| 685 | public function setMakesOffer(Offer $makesOffer) |
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| 690 | |||
| 691 | private $_memberOf; |
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| 692 | |||
| 693 | /** |
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| 694 | * @return Organization|ProgramMembership |
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| 695 | */ |
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| 696 | public function getMemberOf() |
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| 700 | |||
| 701 | /** |
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| 702 | * An Organization (or ProgramMembership) to which this Person or Organization belongs. |
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| 703 | * Inverse property: member. |
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| 704 | * |
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| 705 | * @param Organization|ProgramMembership $memberOf |
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| 706 | * @return PersonTrait |
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| 707 | */ |
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| 708 | public function setMemberOf($memberOf) |
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| 713 | |||
| 714 | private $_naics; |
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| 715 | |||
| 716 | /** |
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| 717 | * @return string |
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| 718 | */ |
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| 719 | public function getNaics() |
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| 723 | |||
| 724 | /** |
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| 725 | * The North American Industry Classification System (NAICS) code for a particular organization or business person. |
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| 726 | * |
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| 727 | * @param string $naics |
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| 728 | * @return PersonTrait |
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| 729 | */ |
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| 730 | public function setNaics($naics) |
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| 735 | |||
| 736 | private $_nationality; |
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| 737 | |||
| 738 | /** |
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| 739 | * @return Country |
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| 740 | */ |
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| 741 | public function getNationality() |
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| 745 | |||
| 746 | /** |
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| 747 | * Nationality of the person. |
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| 748 | * |
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| 749 | * @param Country $nationality |
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| 750 | * @return PersonTrait |
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| 751 | */ |
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| 752 | public function setNationality(Country $nationality) |
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| 757 | |||
| 758 | private $_parent; |
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| 759 | |||
| 760 | /** |
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| 761 | * @return Person |
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| 762 | */ |
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| 763 | public function getParent() |
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| 767 | |||
| 768 | /** |
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| 769 | * A parent of this person. Supersedes parents. |
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| 770 | * |
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| 771 | * @param Person $parent |
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| 772 | * @return PersonTrait |
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| 773 | */ |
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| 774 | public function setParent(Person $parent) |
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| 779 | |||
| 780 | private $_performerIn; |
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| 781 | |||
| 782 | /** |
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| 783 | * @return Event |
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| 784 | */ |
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| 785 | public function getPerformerIn() |
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| 789 | |||
| 790 | /** |
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| 791 | * Event that this person is a performer or participant in. |
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| 792 | * |
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| 793 | * @param Event $performerIn |
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| 794 | * @return PersonTrait |
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| 795 | */ |
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| 796 | public function setPerformerIn(Event $performerIn) |
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| 801 | |||
| 802 | private $_publishingPrinciples; |
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| 803 | |||
| 804 | /** |
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| 805 | * @return CreativeWork|URL |
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| 806 | */ |
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| 807 | public function getPublishingPrinciples() |
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| 811 | |||
| 812 | /** |
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| 813 | * The publishingPrinciples property indicates (typically via URL) a document describing the editorial principles |
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| 814 | * of an Organization (or individual e.g. a Person writing a blog) that relate to their activities as a publisher, |
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| 815 | * e.g. ethics or diversity policies. When applied to a CreativeWork (e.g. NewsArticle) the principles are those |
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| 816 | * of the party primarily responsible for the creation of the CreativeWork. |
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| 817 | * |
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| 818 | * While such policies are most typically expressed in natural language, sometimes related information |
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| 819 | * (e.g. indicating a funder) can be expressed using schema.org terminology. |
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| 820 | * |
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| 821 | * @param CreativeWork|URL $publishingPrinciples |
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| 822 | * @return PersonTrait |
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| 823 | */ |
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| 824 | public function setPublishingPrinciples($publishingPrinciples) |
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| 829 | |||
| 830 | private $_relatedTo; |
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| 831 | |||
| 832 | /** |
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| 833 | * @return Person |
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| 834 | */ |
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| 835 | public function getRelatedTo() |
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| 839 | |||
| 840 | /** |
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| 841 | * The most generic familial relation. |
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| 842 | * |
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| 843 | * @param Person $relatedTo |
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| 844 | * @return PersonTrait |
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| 845 | */ |
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| 846 | public function setRelatedTo(Person $relatedTo) |
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| 851 | |||
| 852 | private $_sibling; |
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| 853 | |||
| 854 | /** |
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| 855 | * @return Person |
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| 856 | */ |
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| 857 | public function getSibling() |
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| 861 | |||
| 862 | /** |
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| 863 | * A sibling of the person. Supersedes siblings. |
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| 864 | * |
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| 865 | * @param Person $sibling |
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| 866 | * @return PersonTrait |
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| 867 | */ |
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| 868 | public function setSibling(Person $sibling) |
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| 873 | |||
| 874 | private $_sponsor; |
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| 875 | |||
| 876 | /** |
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| 877 | * @return Organization|Person |
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| 878 | */ |
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| 879 | public function getSponsor() |
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| 883 | |||
| 884 | /** |
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| 885 | * A person or organization that supports a thing through a pledge, promise, or financial contribution. |
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| 886 | * e.g. a sponsor of a Medical Study or a corporate sponsor of an event. |
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| 887 | * |
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| 888 | * @param Organization|Person $sponsor |
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| 889 | * @return PersonTrait |
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| 890 | */ |
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| 891 | View Code Duplication | public function setSponsor($sponsor) |
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| 898 | |||
| 899 | private $_spouse; |
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| 900 | |||
| 901 | /** |
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| 902 | * @return Person |
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| 903 | */ |
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| 904 | public function getSpouse() |
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| 908 | |||
| 909 | /** |
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| 910 | * The person's spouse. |
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| 911 | * |
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| 912 | * @param Person $spouse |
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| 913 | * @return PersonTrait |
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| 914 | */ |
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| 915 | public function setSpouse(Person $spouse) |
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| 920 | |||
| 921 | private $_taxID; |
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| 922 | |||
| 923 | /** |
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| 924 | * @return string |
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| 925 | */ |
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| 926 | public function getTaxID() |
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| 930 | |||
| 931 | /** |
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| 932 | * The Tax / Fiscal ID of the organization or person, e.g. the TIN in the US or the CIF/NIF in Spain. |
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| 933 | * |
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| 934 | * @param string $taxID |
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| 935 | * @return PersonTrait |
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| 936 | */ |
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| 937 | public function setTaxID($taxID) |
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| 942 | |||
| 943 | private $_telephone; |
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| 944 | |||
| 945 | /** |
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| 946 | * @return string |
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| 947 | */ |
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| 948 | public function getTelephone() |
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| 952 | |||
| 953 | /** |
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| 954 | * The telephone number. |
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| 955 | * |
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| 956 | * @param string $telephone |
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| 957 | * @return PersonTrait |
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| 958 | */ |
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| 959 | public function setTelephone($telephone) |
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| 964 | |||
| 965 | private $_vatID; |
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| 966 | |||
| 967 | /** |
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| 968 | * @return string |
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| 969 | */ |
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| 970 | public function getVatID() |
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| 974 | |||
| 975 | /** |
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| 976 | * The Value-added Tax ID of the organization or person. |
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| 977 | * |
||
| 978 | * @param string $vatID |
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| 979 | * @return PersonTrait |
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| 980 | */ |
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| 981 | public function setVatID($vatID) |
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| 986 | |||
| 987 | private $_workLocation; |
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| 988 | |||
| 989 | /** |
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| 990 | * @return ContactPoint|Place |
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| 991 | */ |
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| 992 | public function getWorkLocation() |
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| 996 | |||
| 997 | /** |
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| 998 | * A contact location for a person's place of work. |
||
| 999 | * |
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| 1000 | * @param ContactPoint|Place $workLocation |
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| 1001 | * @return PersonTrait |
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| 1002 | */ |
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| 1003 | public function setWorkLocation($workLocation) |
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| 1008 | |||
| 1009 | private $_worksFor; |
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| 1010 | |||
| 1011 | /** |
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| 1012 | * @return Organization |
||
| 1013 | */ |
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| 1014 | public function getWorksFor() |
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| 1018 | |||
| 1019 | /** |
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| 1020 | * Organizations that the person works for. |
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| 1021 | * |
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| 1022 | * @param Organization $worksFor |
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| 1023 | * @return PersonTrait |
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| 1024 | */ |
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| 1025 | public function setWorksFor(Organization $worksFor) |
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| 1030 | } |
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| 1031 |
In PHP traits cannot be used for type-hinting as they do not define a well-defined structure. This is because any class that uses a trait can rename that trait’s methods.
If you would like to return an object that has a guaranteed set of methods, you could create a companion interface that lists these methods explicitly.