code: public final ListDevicesPagedResponse listDevices(RegistryName parent) {
      ListDevicesRequest request =
          ListDevicesRequest.newBuilder()
              .setParent(parent == null ? null : parent.toString())
              .build();
      return listDevices(request);
    }
docs: List devices in a device registry.
  
  <p>Sample code:
  
  <pre><code>
  try (DeviceManagerClient deviceManagerClient = DeviceManagerClient.create()) {
  RegistryName parent = RegistryName.of("[PROJECT]", "[LOCATION]", "[REGISTRY]");
  for (Device element : deviceManagerClient.listDevices(parent).iterateAll()) {
  // doThingsWith(element);
  }
  }
  </code></pre>
  
  @param parent The device registry path. Required. For example,
  `projects/my-project/locations/us-central1/registries/my-registry`.
  @throws com.google.api.gax.rpc.ApiException if the remote call fails