:param template: *string* human readable string with placeholders for parameters
        :param default_params: *dict* parameters to fill in template
        :param cause: *Exception* for chaining
        :param stack_depth:  *int* how many calls you want popped off the stack to report the *true* caller
        :param log_context: *dict* extra key:value pairs for your convenience
        :param more_params: *any more parameters (which will overwrite default_params)
        :return:

def warning(
        cls,
        template,
        default_params={},
        cause=None,
        stack_depth=0,
        log_context=None,
        **more_params
    ):
        """
        :param template: *string* human readable string with placeholders for parameters
        :param default_params: *dict* parameters to fill in template
        :param cause: *Exception* for chaining
        :param stack_depth:  *int* how many calls you want popped off the stack to report the *true* caller
        :param log_context: *dict* extra key:value pairs for your convenience
        :param more_params: *any more parameters (which will overwrite default_params)
        :return:
        """
        timestamp = datetime.utcnow()
        if not is_text(template):
            Log.error("Log.warning was expecting a unicode template")

        if isinstance(default_params, BaseException):
            cause = default_params
            default_params = {}

        if "values" in more_params.keys():
            Log.error("Can not handle a logging parameter by name `values`")

        params = Data(dict(default_params, **more_params))
        cause = unwraplist([Except.wrap(c) for c in listwrap(cause)])
        trace = exceptions.extract_stack(stack_depth + 1)

        e = Except(exceptions.WARNING, template=template, params=params, cause=cause, trace=trace)
        Log._annotate(
            e,
            timestamp,
            stack_depth+1
        )