def s(self, p, b=_shortcut_[sc_path]):
        """ shortcut of App.resolve.
        We provide a default base for '#/paths'. ex. to access '#/paths/~1user/get',
        just call App.s('user/get')

        :param str p: path relative to base
        :param tuple b: a tuple (expected_prefix, base) to represent a 'base'
        """

        if b[0]:
            return self.resolve(utils.jp_compose(b[0] + p if not p.startswith(b[0]) else p, base=b[1]))
        else:
            return self.resolve(utils.jp_compose(p, base=b[1]))