original_string: public function findRootOf( $id )
      {
          return $this->findOne( array(
              'id' => $this->sql()
                           ->select()
                           ->columns( array( 'rootId' ) )
                           ->where( array(
                               'id' => $id,
                           ) ),
          ) );
      }
code: public function findRootOf( $id )
      {
          return $this->findOne( array(
              'id' => $this->sql()
                           ->select()
                           ->columns( array( 'rootId' ) )
                           ->where( array(
                               'id' => $id,
                           ) ),
          ) );
      }
code_tokens: public function findRootOf ( $ id ) { return $ this -> findOne ( array ( 'id' => $ this -> sql ( ) -> select ( ) -> columns ( array ( 'rootId' ) ) -> where ( array ( 'id' => $ id , ) ) , ) ) ; }
docstring: Find root paragraph of paragraph by id
  
  @param int $id
  @return \Paragraph\Model\Paragraph\StructureInterface
docstring_tokens: Find root paragraph of paragraph by id