code: def get_resources(cls):
          
          exts = []
          parent = dict(member_name=ciscohostingdevicemanager.DEVICE,
                        collection_name=ciscohostingdevicemanager.DEVICES)
          controller = resource.Resource(
              RouterHostingDeviceSchedulerController(), cb_faults.FAULT_MAP)
          exts.append(extensions.ResourceExtension(
              DEVICE_L3_ROUTERS, controller, parent, path_prefix="/dev_mgr"))
          parent = dict(member_name="router",
                        collection_name=l3_const.ROUTERS)
          controller = resource.Resource(
              HostingDevicesHostingRouterController(), cb_faults.FAULT_MAP)
          exts.append(extensions.ResourceExtension(L3_ROUTER_DEVICES, controller,
                                                   parent))
          return exts
docs: Returns Ext Resources.