Get one workgroup node.

def head(self, wg_uuid, uuid):
        """ Get one workgroup node."""
        url = "%(base)s/%(wg_uuid)s/nodes/%(uuid)s" % {
            'base': self.local_base_url,
            'wg_uuid': wg_uuid,
            'uuid': uuid
        }
        # return self.core.head(url)
        try:
            # workaround
            return self.core.get(url)
        except LinShareException:
            return False