code: public function setChildMedias(array $childMedias)
      {
          $this->childMedias = [];
  
          foreach ($childMedias as $item) {
              $this->addself($item);
          }
  
          return $this;
      }
docs: Sets the "childMedias" of the MediaResponse.
  
  @param self[] $childMedias
  
  @return MediaResponse