code: def sync_map_permissions(self):
          
          if self._sync_map_permissions is None:
              self._sync_map_permissions = SyncMapPermissionList(
                  self._version,
                  service_sid=self._solution['service_sid'],
                  map_sid=self._solution['sid'],
              )
          return self._sync_map_permissions
docs: Access the sync_map_permissions
  
          :returns: twilio.rest.sync.v1.service.sync_map.sync_map_permission.SyncMapPermissionList
          :rtype: twilio.rest.sync.v1.service.sync_map.sync_map_permission.SyncMapPermissionList