/**
  * Returns the boundaries of an array of Marker objects
  * @param Marker[] $markers
  * @param float $margin
  * @return LatLngBounds
  * @throws \yii\base\InvalidParamException
  */
 public static function getBoundsOfMarkers($markers, $margin = 0.0)
 {
     $coords = [];
     foreach ($markers as $marker) {
         if (!$marker instanceof Marker) {
             throw new InvalidParamException('"$markers" must be an array of "' . Marker::className() . '" objects');
         }
         $coords[] = $marker->position;
     }
     return LatLngBounds::getBoundsOfCoordinates($coords, $margin);
 }
 /**
  * @return LatLng|null
  */
 public function getMarkersCenterCoordinates()
 {
     return Marker::getCenterOfMarkers($this->getMarkers());
 }