A parameter in this :class:`.Router`

def getparam(self, name, default=None, parents=False):
        '''A parameter in this :class:`.Router`
        '''
        value = getattr(self, name, None)
        if value is None:
            if parents and self._parent:
                return self._parent.getparam(name, default, parents)
            else:
                return default
        else:
            return value