def METHOD_NAME(self, lang, src):
    """Handle code block."""
    for entry in reversed(self.formatters):
        if entry["test"](lang):
            value = entry["formatter"](
                src=src,
                language=lang,
                md=self.md
            )
            if isinstance(value, str):
                value = self.md.htmlStash.store(value)
            return value