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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_message(self, method, args, kwargs, options=None):
 """ Get the soap message for the specified method, args and soapheaders. This is the entry point for creating the outbound soap message. @param method: The method being invoked. @type method: I{service.Method} @param args: A list of args for the method invoked. @type args: list @param kwargs: Named (keyword) args for the method invoked. @type kwargs: dict @return: The soap envelope. @rtype: L{Document} """


        content = self.headercontent(method, options=options)
        header = self.header(content)
        content = self.bodycontent(method, args, kwargs)
        body = self.body(content)
        env = self.envelope(header, body)
        if self.options().prefixes:
            body.normalizePrefixes()
            env.promotePrefixes()
        else:
            env.refitPrefixes()
        return Document(env)