code: def _handle_codeblock(self, match):
          
          from pygments.lexers import get_lexer_by_name
  
          # section header
          yield match.start(1), String        , match.group(1)
          yield match.start(2), String        , match.group(2)
          yield match.start(3), Text          , match.group(3)
  
          # lookup lexer if wanted and existing
          lexer = None
          if self.handlecodeblocks:
              try:
                  lexer = get_lexer_by_name( match.group(2).strip() )
              except ClassNotFound:
                  pass
          code = match.group(4)
  
          # no lexer for this language. handle it like it was a code block
          if lexer is None:
              yield match.start(4), String, code
              return
  
          for item in do_insertions([], lexer.get_tokens_unprocessed(code)):
              yield item
  
          yield match.start(5), String        , match.group(5)
docs: match args: 1:backticks, 2:lang_name, 3:newline, 4:code, 5:backticks