original_string: public function getClasses()
      {
          $classes = $this->getAttribute("class");
          return (strlen($classes) > 0) ? trim($this->removeMultipleSpaces($classes)) : "";
      }
code: public function getClasses()
      {
          $classes = $this->getAttribute("class");
          return (strlen($classes) > 0) ? trim($this->removeMultipleSpaces($classes)) : "";
      }
code_tokens: public function getClasses ( ) { $ classes = $ this -> getAttribute ( "class" ) ; return ( strlen ( $ classes ) > 0 ) ? trim ( $ this -> removeMultipleSpaces ( $ classes ) ) : "" ; }
docstring: Returns a space separated string of classes belonging to the tag.
  @return  string
  @throws  HTMLTagException
docstring_tokens: Returns a space separated string of classes belonging to the tag .