Starts a search for new Hue objects

def __find_new(self, hueobjecttype):
        '''
        Starts a search for new Hue objects
        '''
        assert hueobjecttype in ['lights', 'sensors'], \
            'Unsupported object type {}'.format(hueobjecttype)
        url = '{}/{}'.format(self.API, hueobjecttype)
        return self._request(
            method='POST',
            url=url
        )