code: protected function _getRelation($attributeName, $query = false, $loadMap = false, $record = false)
      {
        // Grab attribute definition
        $def = $this->model_attributes[$attributeName];
        $result = false;
        
        if (isset($def['models'])) {
          $result = $this->_getModels($attributeName, $def['models'], $query, $loadMap, $record);
        } 
        
        else if (isset($def['model'])) {
          $result = $this->_getModel($attributeName, $def['model'], $query, $loadMap, $record);
        }
  
        return $result;
      }
docs: Returns related models. May return a single model, or a collection depending on if the relationship is
  defined as singular or plural. If attribute is not a relationship, then will return false.
  
  @return Model or False