original_string: protected function _getPrimaryKey()
      {
          if (!$this->_primaryKey) {
              $primaryKey = (array)$this->_table->getPrimaryKey();
              $this->_primaryKey = $primaryKey[0];
          }
  
          return $this->_primaryKey;
      }
code: protected function _getPrimaryKey()
      {
          if (!$this->_primaryKey) {
              $primaryKey = (array)$this->_table->getPrimaryKey();
              $this->_primaryKey = $primaryKey[0];
          }
  
          return $this->_primaryKey;
      }
code_tokens: protected function _getPrimaryKey ( ) { if ( ! $ this -> _primaryKey ) { $ primaryKey = ( array ) $ this -> _table -> getPrimaryKey ( ) ; $ this -> _primaryKey = $ primaryKey [ 0 ] ; } return $ this -> _primaryKey ; }
docstring: Returns a single string value representing the primary key of the attached table
  
  @return string
docstring_tokens: Returns a single string value representing the primary key of the attached table