Complex classes like DistanceMatrixRequest 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 DistanceMatrixRequest, and based on these observations, apply Extract Interface, too.
| 1 | <?php  | 
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| 21 | class DistanceMatrixRequest  | 
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| 22 | { | 
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| 23 | /**  | 
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| 24 | * @var Coordinate[]|string[]  | 
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| 25 | */  | 
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| 26 | private $origins = [];  | 
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| 27 | |||
| 28 | /**  | 
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| 29 | * @var Coordinate[]|string[]  | 
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| 30 | */  | 
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| 31 | private $destinations = [];  | 
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| 32 | |||
| 33 | /**  | 
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| 34 | * @var \DateTime|null  | 
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| 35 | */  | 
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| 36 | private $departureTime;  | 
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| 37 | |||
| 38 | /**  | 
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| 39 | * @var \DateTime|null  | 
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| 40 | */  | 
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| 41 | private $arrivalTime;  | 
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| 42 | |||
| 43 | /**  | 
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| 44 | * @var string|null  | 
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| 45 | */  | 
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| 46 | private $travelMode;  | 
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| 47 | |||
| 48 | /**  | 
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| 49 | * @var string|null  | 
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| 50 | */  | 
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| 51 | private $avoid;  | 
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| 52 | |||
| 53 | /**  | 
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| 54 | * @var string|null  | 
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| 55 | */  | 
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| 56 | private $region;  | 
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| 57 | |||
| 58 | /**  | 
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| 59 | * @var string|null  | 
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| 60 | */  | 
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| 61 | private $unitSystem;  | 
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| 62 | |||
| 63 | /**  | 
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| 64 | * @var string|null  | 
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| 65 | */  | 
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| 66 | private $language;  | 
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| 67 | |||
| 68 | /**  | 
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| 69 | * @param Coordinate[]|string[] $origins  | 
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| 70 | * @param Coordinate[]|string[] $destinations  | 
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| 71 | */  | 
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| 72 | public function __construct(array $origins, array $destinations)  | 
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| 77 | |||
| 78 | /**  | 
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| 79 | * @return bool  | 
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| 80 | */  | 
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| 81 | public function hasOrigins()  | 
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| 85 | |||
| 86 | /**  | 
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| 87 | * @return Coordinate[]|string[]  | 
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| 88 | */  | 
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| 89 | public function getOrigins()  | 
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| 93 | |||
| 94 | /**  | 
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| 95 | * @param Coordinate[]|string[] $origins  | 
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| 96 | */  | 
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| 97 | public function setOrigins(array $origins)  | 
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| 102 | |||
| 103 | /**  | 
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| 104 | * @param Coordinate[]|string[] $origins  | 
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| 105 | */  | 
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| 106 | public function addOrigins(array $origins)  | 
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| 112 | |||
| 113 | /**  | 
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| 114 | * @param Coordinate|string $origin  | 
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| 115 | *  | 
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| 116 | * @return bool  | 
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| 117 | */  | 
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| 118 | public function hasOrigin($origin)  | 
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| 122 | |||
| 123 | /**  | 
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| 124 | * @param Coordinate|string $origin  | 
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| 125 | */  | 
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| 126 | public function addOrigin($origin)  | 
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| 132 | |||
| 133 | /**  | 
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| 134 | * @param Coordinate|string $origin  | 
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| 135 | */  | 
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| 136 | public function removeOrigin($origin)  | 
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| 141 | |||
| 142 | /**  | 
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| 143 | * @return bool  | 
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| 144 | */  | 
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| 145 | public function hasDestinations()  | 
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| 149 | |||
| 150 | /**  | 
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| 151 | * @return Coordinate[]|string[]  | 
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| 152 | */  | 
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| 153 | public function getDestinations()  | 
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| 157 | |||
| 158 | /**  | 
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| 159 | * @param Coordinate[]|string[] $destinations  | 
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| 160 | */  | 
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| 161 | public function setDestinations(array $destinations)  | 
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| 166 | |||
| 167 | /**  | 
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| 168 | * @param Coordinate[]|string[] $destinations  | 
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| 169 | */  | 
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| 170 | public function addDestinations(array $destinations)  | 
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| 176 | |||
| 177 | /**  | 
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| 178 | * @param Coordinate|string $destination  | 
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| 179 | *  | 
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| 180 | * @return bool  | 
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| 181 | */  | 
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| 182 | public function hasDestination($destination)  | 
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| 186 | |||
| 187 | /**  | 
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| 188 | * @param Coordinate|string $destination  | 
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| 189 | */  | 
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| 190 | public function addDestination($destination)  | 
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| 196 | |||
| 197 | /**  | 
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| 198 | * @param Coordinate|string $destination  | 
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| 199 | */  | 
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| 200 | public function removeDestination($destination)  | 
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| 205 | |||
| 206 | /**  | 
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| 207 | * @return bool  | 
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| 208 | */  | 
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| 209 | public function hasDepartureTime()  | 
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| 213 | |||
| 214 | /**  | 
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| 215 | * @return \DateTime|null  | 
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| 216 | */  | 
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| 217 | public function getDepartureTime()  | 
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| 221 | |||
| 222 | /**  | 
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| 223 | * @param \DateTime|null $departureTime  | 
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| 224 | */  | 
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| 225 | public function setDepartureTime(\DateTime $departureTime = null)  | 
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| 229 | |||
| 230 | /**  | 
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| 231 | * @return bool  | 
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| 232 | */  | 
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| 233 | public function hasArrivalTime()  | 
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| 237 | |||
| 238 | /**  | 
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| 239 | * @return \DateTime|null  | 
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| 240 | */  | 
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| 241 | public function getArrivalTime()  | 
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| 245 | |||
| 246 | /**  | 
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| 247 | * @param \DateTime|null $arrivalTime  | 
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| 248 | */  | 
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| 249 | public function setArrivalTime(\DateTime $arrivalTime = null)  | 
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| 253 | |||
| 254 | /**  | 
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| 255 | * @return bool  | 
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| 256 | */  | 
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| 257 | public function hasTravelMode()  | 
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| 261 | |||
| 262 | /**  | 
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| 263 | * @return string|null  | 
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| 264 | */  | 
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| 265 | public function getTravelMode()  | 
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| 269 | |||
| 270 | /**  | 
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| 271 | * @param string|null $travelMode  | 
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| 272 | */  | 
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| 273 | public function setTravelMode($travelMode = null)  | 
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| 277 | |||
| 278 | /**  | 
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| 279 | * @return bool  | 
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| 280 | */  | 
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| 281 | public function hasAvoid()  | 
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| 285 | |||
| 286 | /**  | 
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| 287 | * @return string|null  | 
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| 288 | */  | 
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| 289 | public function getAvoid()  | 
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| 293 | |||
| 294 | /**  | 
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| 295 | * @param string|null $avoid  | 
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| 296 | */  | 
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| 297 | public function setAvoid($avoid = null)  | 
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| 301 | |||
| 302 | /**  | 
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| 303 | * @return bool  | 
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| 304 | */  | 
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| 305 | public function hasRegion()  | 
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| 309 | |||
| 310 | /**  | 
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| 311 | * @return string|null  | 
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| 312 | */  | 
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| 313 | public function getRegion()  | 
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| 317 | |||
| 318 | /**  | 
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| 319 | * @param string|null $region  | 
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| 320 | */  | 
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| 321 | public function setRegion($region = null)  | 
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| 325 | |||
| 326 | /**  | 
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| 327 | * @return bool  | 
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| 328 | */  | 
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| 329 | public function hasUnitSystem()  | 
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| 333 | |||
| 334 | /**  | 
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| 335 | * @return string|null  | 
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| 336 | */  | 
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| 337 | public function getUnitSystem()  | 
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| 341 | |||
| 342 | /**  | 
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| 343 | * @param string|null $unitSystem  | 
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| 344 | */  | 
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| 345 | public function setUnitSystem($unitSystem = null)  | 
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| 349 | |||
| 350 | /**  | 
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| 351 | * @return bool  | 
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| 352 | */  | 
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| 353 | public function hasLanguage()  | 
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| 357 | |||
| 358 | /**  | 
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| 359 | * @return string|null  | 
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| 360 | */  | 
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| 361 | public function getLanguage()  | 
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| 365 | |||
| 366 | /**  | 
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| 367 | * @param string|null $language  | 
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| 368 | */  | 
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| 369 | public function setLanguage($language = null)  | 
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| 373 | |||
| 374 | /**  | 
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| 375 | * @return mixed[]  | 
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| 376 | */  | 
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| 377 | public function buildQuery()  | 
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| 414 | |||
| 415 | /**  | 
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| 416 | * @param Coordinate[]|string[] $places  | 
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| 417 | *  | 
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| 418 | * @return string[]  | 
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| 419 | */  | 
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| 420 | private function buildPlaces(array $places)  | 
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| 430 | |||
| 431 | /**  | 
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| 432 | * @param Coordinate|string $place  | 
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| 433 | *  | 
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| 434 | * @return string  | 
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| 435 | */  | 
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| 436 | private function buildPlace($place)  | 
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| 444 | }  | 
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| 445 |