code: protected function lookUpResource($aData = [], $iSegment = 4)
      {
          $oUri        = Factory::service('Uri');
          $sIdentifier = $oUri->segment($iSegment);
  
          //  Handle requests for expansions
          $oInput      = Factory::service('Input');
          $aData       = array_merge(static::CONFIG_LOOKUP_DATA, $aData);
          $aExpansions = array_filter((array) $oInput->get('expand'));
          if ($aExpansions) {
              if (!array_key_exists('expand', $aData)) {
                  $aData['expand'] = [];
              }
  
              $aData['expand'] = array_merge($aData['expand'], $aExpansions);
          }
  
          switch (static::CONFIG_LOOKUP_METHOD) {
              case 'ID':
                  return $this->oModel->getById($sIdentifier, $aData);
                  break;
              case 'SLUG':
                  return $this->oModel->getBySlug($sIdentifier, $aData);
                  break;
              case 'TOKEN':
                  return $this->oModel->getByToken($sIdentifier, $aData);
                  break;
          }
      }
docs: Fetches an object by it's ID, SLUG, or TOKEN
  
  @param array   $aData    Any data to pass to the lookup
  @param integer $iSegment The segment containing the item's ID/Token/Slug
  
  @return \stdClass|false
  @throws FactoryException