code: protected function parseDescription($content, &$position)
      {
          $this->typeCheck->parseDescription(func_get_args());
  
          return $this->parseContent(
              $content,
              $position,
              '/^\s*(.*)$/',
              true,
              'description'
          );
      }
docs: @param string $content
  @param integer &$position
  
  @return string|null