original_string: public function on_question_categories_start() {
          $this->open_xml_writer('questions.xml');
          $this->xmlwriter->begin_tag('question_categories');
          if (is_null($this->fileman)) {
              $this->fileman = $this->converter->get_file_manager();
          }
      }
code: public function on_question_categories_start() {
          $this->open_xml_writer('questions.xml');
          $this->xmlwriter->begin_tag('question_categories');
          if (is_null($this->fileman)) {
              $this->fileman = $this->converter->get_file_manager();
          }
      }
code_tokens: public function on_question_categories_start ( ) { $ this -> open_xml_writer ( 'questions.xml' ) ; $ this -> xmlwriter -> begin_tag ( 'question_categories' ) ; if ( is_null ( $ this -> fileman ) ) { $ this -> fileman = $ this -> converter -> get_file_manager ( ) ; } }
docstring: Starts writing questions.xml and prepares the file manager instance
docstring_tokens: Starts writing questions . xml and prepares the file manager instance