def _sync_call(self, func):
        """__call__ function for regular synchronous functions.

        Args:
            func: The annotated function.
            args: Arguments for func.
            kwargs: Keyword arguments for func.
        """

        @functools.wraps(func)
        def wrapper(*args, **kwargs):
            if self._start_msg:
                self._start_print()
            result = func(*args, **kwargs)
            if self._end_msg:
                print(self._end_msg)
            return result

        setattr(wrapper, ANNOTATED, True)
        return wrapper