original_string: public function metaKeywordString()
      {
          $tagKeywords = array_map(
          function( $tag )
              {
                  /** @var eZTagsObject $tag */
                  return $tag->attribute( 'keyword' );
              },
              $this->tags()
          );
  
          return !empty( $tagKeywords ) ? implode( ', ', $tagKeywords ) : '';
      }
code: public function metaKeywordString()
      {
          $tagKeywords = array_map(
          function( $tag )
              {
                  /** @var eZTagsObject $tag */
                  return $tag->attribute( 'keyword' );
              },
              $this->tags()
          );
  
          return !empty( $tagKeywords ) ? implode( ', ', $tagKeywords ) : '';
      }
code_tokens: public function metaKeywordString ( ) { $ tagKeywords = array_map ( function ( $ tag ) { /** @var eZTagsObject $tag */ return $ tag -> attribute ( 'keyword' ) ; } , $ this -> tags ( ) ) ; return ! empty ( $ tagKeywords ) ? implode ( ', ' , $ tagKeywords ) : '' ; }
docstring: Returns the keywords as a string
  
  @return string
docstring_tokens: Returns the keywords as a string