original_string: public function refSQL()
      {
          /** @type SQL_Model $q */
          $q = $this->ref('model');
          $q->addCondition($q->id_field, $this);
  
          return $q;
      }
code: public function refSQL()
      {
          /** @type SQL_Model $q */
          $q = $this->ref('model');
          $q->addCondition($q->id_field, $this);
  
          return $q;
      }
code_tokens: public function refSQL ( ) { /** @type SQL_Model $q */ $ q = $ this -> ref ( 'model' ) ; $ q -> addCondition ( $ q -> id_field , $ this ) ; return $ q ; }
docstring: Return DSQL for field
  
  @return SQL_Model
docstring_tokens: Return DSQL for field