original_string: public function getForeignKey()
      {
          if ($this->_foreignKey === null) {
              $this->_foreignKey = $this->_modelKey($this->getSource()->getTable());
          }
  
          return $this->_foreignKey;
      }
code: public function getForeignKey()
      {
          if ($this->_foreignKey === null) {
              $this->_foreignKey = $this->_modelKey($this->getSource()->getTable());
          }
  
          return $this->_foreignKey;
      }
code_tokens: public function getForeignKey ( ) { if ( $ this -> _foreignKey === null ) { $ this -> _foreignKey = $ this -> _modelKey ( $ this -> getSource ( ) -> getTable ( ) ) ; } return $ this -> _foreignKey ; }
docstring: Gets the name of the field representing the foreign key to the source table.
  
  @return string
docstring_tokens: Gets the name of the field representing the foreign key to the source table .