'Add a <Message> element
:param body: body of the message
:param to: number to send to
:param from_: number to send from
:param method: action HTTP method
:param action: action URL
:param status_callback: callback URL
:param kwargs: other attributes
:return: <Response> element'

def message(self, body, to=None, from_=None, method=None, action=None, status_callback=None, **kwargs):

    return self.nest(Message(body=body, to=to, from_=from_, method=method, action=action, status_callback=status_callback, **kwargs))
