Sulu\Component\Rest\ListBuilder\Doctrine\FieldDescriptor\AbstractDoctrineFieldDescriptor::getJoins PHP Method

    public abstract function getJoins();

 /**
  * Returns all the joins required for the query.
  *
  * @return DoctrineJoinDescriptor[]
  */
 private function getJoins()
 {
     $joins = [];
     if ($this->sortField != null) {
         $joins = array_merge($joins, $this->sortField->getJoins());
     }
     foreach ($this->fields as $field) {
         $joins = array_merge($joins, $field->getJoins());
     }
     foreach ($this->searchFields as $searchField) {
         $joins = array_merge($joins, $searchField->getJoins());
     }
     foreach ($this->whereFields as $whereField) {
         $joins = array_merge($joins, $whereField->getJoins());
     }
     foreach ($this->whereNotFields as $whereNotField) {
         $joins = array_merge($joins, $whereNotField->getJoins());
     }
     foreach ($this->inFields as $inField) {
         $joins = array_merge($joins, $inField->getJoins());
     }
     return $joins;
 }