lb id is required in listener

When create a stack with follow template:
heat_template_version: 2016-10-14
description: AutoScaling Test
resources:
  lb:
    type: OS::Octavia::LoadBalancer
    properties:
      name: test_lb
      description: test for load balancer
      vip_subnet: ef9d0205-1441-4924-b000-526dc5e02f49
      admin_state_up: true
  pool:
    type: OS::Octavia::Pool
    properties:
      name: test_pool
      description: test for pool
      admin_state_up: true
      lb_algorithm: ROUND_ROBIN
      loadbalancer: { get_resource: lb }
      protocol: HTTP
  listener:
    type: OS::Octavia::Listener
    properties:
      protocol: HTTP
      protocol_port: 8080
      default_pool: { get_resource: pool }

will raise 'Resource CREATE failed: OctaviaClientException: resources.listener: Invalid input for field/attribute loadbalancer_id. Value: 'None'. Mandatory field missing. (HTTP 400) (Request-ID: req-10dbf10f-ab0d-4aa7-bf28-23b471793600)' exception.

It shows that loadbalancer id in required in listener creation API.