original_string: public function field($name)
      {
          return isset($this->_properties['fields'][$name])?
              $this->_properties['fields'][$name]:null;
      }
code: public function field($name)
      {
          return isset($this->_properties['fields'][$name])?
              $this->_properties['fields'][$name]:null;
      }
code_tokens: public function field ( $ name ) { return isset ( $ this -> _properties [ 'fields' ] [ $ name ] ) ? $ this -> _properties [ 'fields' ] [ $ name ] : null ; }
docstring: return field alias
docstring_tokens: return field alias