original_string: public function setRelation($relation, $relationColumn = null)
      {
          $this->relation = $relation;
          $this->relationColumn = $relationColumn;
  
          return $this;
      }
code: public function setRelation($relation, $relationColumn = null)
      {
          $this->relation = $relation;
          $this->relationColumn = $relationColumn;
  
          return $this;
      }
code_tokens: public function setRelation ( $ relation , $ relationColumn = null ) { $ this -> relation = $ relation ; $ this -> relationColumn = $ relationColumn ; return $ this ; }
docstring: Set relation.
  
  @param string $relation
  @param string $relationColumn
  
  @return $this
docstring_tokens: Set relation .