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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| 22 | class DistanceMatrixRequest implements DistanceMatrixRequestInterface  | 
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| 23 | { | 
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| 24 | /**  | 
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| 25 | * @var LocationInterface[]  | 
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| 26 | */  | 
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| 27 | private $origins = [];  | 
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| 28 | |||
| 29 | /**  | 
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| 30 | * @var LocationInterface[]  | 
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| 31 | */  | 
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| 32 | private $destinations = [];  | 
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| 33 | |||
| 34 | /**  | 
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| 35 | * @var \DateTime|null  | 
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| 36 | */  | 
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| 37 | private $departureTime;  | 
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| 38 | |||
| 39 | /**  | 
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| 40 | * @var \DateTime|null  | 
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| 41 | */  | 
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| 42 | private $arrivalTime;  | 
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| 43 | |||
| 44 | /**  | 
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| 45 | * @var string|null  | 
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| 46 | */  | 
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| 47 | private $travelMode;  | 
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| 48 | |||
| 49 | /**  | 
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| 50 | * @var string|null  | 
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| 51 | */  | 
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| 52 | private $avoid;  | 
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| 53 | |||
| 54 | /**  | 
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| 55 | * @var string|null  | 
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| 56 | */  | 
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| 57 | private $trafficModel;  | 
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| 58 | |||
| 59 | /**  | 
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| 60 | * @var string[]  | 
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| 61 | */  | 
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| 62 | private $transitModes = [];  | 
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| 63 | |||
| 64 | /**  | 
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| 65 | * @var string|null  | 
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| 66 | */  | 
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| 67 | private $transitRoutingPreference;  | 
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| 68 | |||
| 69 | /**  | 
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| 70 | * @var string|null  | 
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| 71 | */  | 
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| 72 | private $region;  | 
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| 73 | |||
| 74 | /**  | 
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| 75 | * @var string|null  | 
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| 76 | */  | 
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| 77 | private $unitSystem;  | 
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| 78 | |||
| 79 | /**  | 
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| 80 | * @var string|null  | 
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| 81 | */  | 
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| 82 | private $language;  | 
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| 83 | |||
| 84 | /**  | 
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| 85 | * @param LocationInterface[] $origins  | 
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| 86 | * @param LocationInterface[] $destinations  | 
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| 87 | */  | 
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| 88 | 348 | public function __construct(array $origins, array $destinations)  | 
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| 93 | |||
| 94 | /**  | 
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| 95 | * @return bool  | 
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| 96 | */  | 
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| 97 | 20 | public function hasOrigins()  | 
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| 101 | |||
| 102 | /**  | 
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| 103 | * @return LocationInterface[]  | 
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| 104 | */  | 
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| 105 | 20 | public function getOrigins()  | 
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| 109 | |||
| 110 | /**  | 
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| 111 | * @param LocationInterface[] $origins  | 
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| 112 | */  | 
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| 113 | 348 | public function setOrigins(array $origins)  | 
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| 118 | |||
| 119 | /**  | 
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| 120 | * @param LocationInterface[] $origins  | 
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| 121 | */  | 
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| 122 | 348 | public function addOrigins(array $origins)  | 
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| 128 | |||
| 129 | /**  | 
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| 130 | * @param LocationInterface $origin  | 
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| 131 | *  | 
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| 132 | * @return bool  | 
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| 133 | */  | 
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| 134 | 348 | public function hasOrigin(LocationInterface $origin)  | 
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| 138 | |||
| 139 | /**  | 
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| 140 | * @param LocationInterface $origin  | 
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| 141 | */  | 
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| 142 | 348 | public function addOrigin(LocationInterface $origin)  | 
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| 148 | |||
| 149 | /**  | 
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| 150 | * @param LocationInterface $origin  | 
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| 151 | */  | 
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| 152 | 4 | public function removeOrigin(LocationInterface $origin)  | 
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| 157 | |||
| 158 | /**  | 
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| 159 | * @return bool  | 
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| 160 | */  | 
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| 161 | 20 | public function hasDestinations()  | 
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| 165 | |||
| 166 | /**  | 
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| 167 | * @return LocationInterface[]  | 
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| 168 | */  | 
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| 169 | 20 | public function getDestinations()  | 
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| 173 | |||
| 174 | /**  | 
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| 175 | * @param LocationInterface[] $destinations  | 
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| 176 | */  | 
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| 177 | 348 | public function setDestinations(array $destinations)  | 
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| 182 | |||
| 183 | /**  | 
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| 184 | * @param LocationInterface[] $destinations  | 
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| 185 | */  | 
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| 186 | 348 | public function addDestinations(array $destinations)  | 
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| 192 | |||
| 193 | /**  | 
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| 194 | * @param LocationInterface $destination  | 
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| 195 | *  | 
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| 196 | * @return bool  | 
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| 197 | */  | 
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| 198 | 348 | public function hasDestination(LocationInterface $destination)  | 
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| 202 | |||
| 203 | /**  | 
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| 204 | * @param LocationInterface $destination  | 
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| 205 | */  | 
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| 206 | 348 | public function addDestination(LocationInterface $destination)  | 
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| 212 | |||
| 213 | /**  | 
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| 214 | * @param LocationInterface $destination  | 
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| 215 | */  | 
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| 216 | 4 | public function removeDestination(LocationInterface $destination)  | 
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| 221 | |||
| 222 | /**  | 
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| 223 | * @return bool  | 
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| 224 | */  | 
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| 225 | 232 | public function hasDepartureTime()  | 
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| 229 | |||
| 230 | /**  | 
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| 231 | * @return \DateTime|null  | 
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| 232 | */  | 
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| 233 | 12 | public function getDepartureTime()  | 
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| 237 | |||
| 238 | /**  | 
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| 239 | * @param \DateTime|null $departureTime  | 
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| 240 | */  | 
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| 241 | 28 | public function setDepartureTime(\DateTime $departureTime = null)  | 
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| 245 | |||
| 246 | /**  | 
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| 247 | * @return bool  | 
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| 248 | */  | 
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| 249 | 232 | public function hasArrivalTime()  | 
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| 253 | |||
| 254 | /**  | 
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| 255 | * @return \DateTime|null  | 
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| 256 | */  | 
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| 257 | 12 | public function getArrivalTime()  | 
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| 261 | |||
| 262 | /**  | 
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| 263 | * @param \DateTime|null $arrivalTime  | 
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| 264 | */  | 
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| 265 | 28 | public function setArrivalTime(\DateTime $arrivalTime = null)  | 
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| 269 | |||
| 270 | /**  | 
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| 271 | * @return bool  | 
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| 272 | */  | 
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| 273 | 232 | public function hasTravelMode()  | 
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| 277 | |||
| 278 | /**  | 
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| 279 | * @return string|null  | 
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| 280 | */  | 
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| 281 | 12 | public function getTravelMode()  | 
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| 285 | |||
| 286 | /**  | 
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| 287 | * @param string|null $travelMode  | 
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| 288 | */  | 
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| 289 | 28 | public function setTravelMode($travelMode = null)  | 
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| 293 | |||
| 294 | /**  | 
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| 295 | * @return bool  | 
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| 296 | */  | 
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| 297 | 232 | public function hasAvoid()  | 
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| 301 | |||
| 302 | /**  | 
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| 303 | * @return string|null  | 
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| 304 | */  | 
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| 305 | 12 | public function getAvoid()  | 
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| 309 | |||
| 310 | /**  | 
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| 311 | * @param string|null $avoid  | 
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| 312 | */  | 
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| 313 | 28 | public function setAvoid($avoid = null)  | 
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| 317 | |||
| 318 | /**  | 
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| 319 | * @return bool  | 
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| 320 | */  | 
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| 321 | 232 | public function hasTrafficModel()  | 
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| 325 | |||
| 326 | /**  | 
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| 327 | * @return string|null  | 
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| 328 | */  | 
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| 329 | 12 | public function getTrafficModel()  | 
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| 333 | |||
| 334 | /**  | 
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| 335 | * @param string|null $trafficModel  | 
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| 336 | */  | 
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| 337 | 12 | public function setTrafficModel($trafficModel)  | 
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| 341 | |||
| 342 | /**  | 
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| 343 | * @return bool  | 
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| 344 | */  | 
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| 345 | 240 | public function hasTransitModes()  | 
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| 349 | |||
| 350 | /**  | 
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| 351 | * @return string[]  | 
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| 352 | */  | 
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| 353 | 20 | public function getTransitModes()  | 
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| 357 | |||
| 358 | /**  | 
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| 359 | * @param string[] $transitModes  | 
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| 360 | */  | 
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| 361 | 12 | public function setTransitModes(array $transitModes)  | 
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| 366 | |||
| 367 | /**  | 
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| 368 | * @param string[] $transitModes  | 
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| 369 | */  | 
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| 370 | 12 | public function addTransitModes(array $transitModes)  | 
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| 376 | |||
| 377 | /**  | 
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| 378 | * @param string $transitMode  | 
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| 379 | *  | 
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| 380 | * @return bool  | 
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| 381 | */  | 
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| 382 | 20 | public function hasTransitMode($transitMode)  | 
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| 386 | |||
| 387 | /**  | 
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| 388 | * @param string $transitMode  | 
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| 389 | */  | 
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| 390 | 20 | public function addTransitMode($transitMode)  | 
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| 396 | |||
| 397 | /**  | 
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| 398 | * @param string $transitMode  | 
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| 399 | */  | 
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| 400 | 4 | public function removeTransitMode($transitMode)  | 
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| 405 | |||
| 406 | /**  | 
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| 407 | * @return bool  | 
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| 408 | */  | 
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| 409 | 232 | public function hasTransitRoutingPreference()  | 
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| 413 | |||
| 414 | /**  | 
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| 415 | * @return string|null  | 
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| 416 | */  | 
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| 417 | 12 | public function getTransitRoutingPreference()  | 
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| 421 | |||
| 422 | /**  | 
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| 423 | * @param string|null $transitRoutingPreference  | 
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| 424 | */  | 
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| 425 | 12 | public function setTransitRoutingPreference($transitRoutingPreference)  | 
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| 429 | |||
| 430 | /**  | 
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| 431 | * @return bool  | 
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| 432 | */  | 
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| 433 | 232 | public function hasRegion()  | 
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| 437 | |||
| 438 | /**  | 
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| 439 | * @return string|null  | 
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| 440 | */  | 
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| 441 | 12 | public function getRegion()  | 
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| 445 | |||
| 446 | /**  | 
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| 447 | * @param string|null $region  | 
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| 448 | */  | 
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| 449 | 28 | public function setRegion($region = null)  | 
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| 453 | |||
| 454 | /**  | 
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| 455 | * @return bool  | 
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| 456 | */  | 
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| 457 | 232 | public function hasUnitSystem()  | 
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| 461 | |||
| 462 | /**  | 
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| 463 | * @return string|null  | 
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| 464 | */  | 
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| 465 | 12 | public function getUnitSystem()  | 
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| 469 | |||
| 470 | /**  | 
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| 471 | * @param string|null $unitSystem  | 
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| 472 | */  | 
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| 473 | 28 | public function setUnitSystem($unitSystem = null)  | 
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| 477 | |||
| 478 | /**  | 
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| 479 | * @return bool  | 
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| 480 | */  | 
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| 481 | 232 | public function hasLanguage()  | 
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| 485 | |||
| 486 | /**  | 
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| 487 | * @return string|null  | 
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| 488 | */  | 
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| 489 | 12 | public function getLanguage()  | 
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| 493 | |||
| 494 | /**  | 
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| 495 | * @param string|null $language  | 
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| 496 | */  | 
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| 497 | 28 | public function setLanguage($language = null)  | 
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| 501 | |||
| 502 | /**  | 
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| 503 |      * {@inheritdoc} | 
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| 504 | */  | 
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| 505 | public function buildQuery()  | 
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| 564 | }  | 
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| 565 |