code: public final ListKeyRingsPagedResponse listKeyRings(LocationName parent) {
      ListKeyRingsRequest request =
          ListKeyRingsRequest.newBuilder()
              .setParent(parent == null ? null : parent.toString())
              .build();
      return listKeyRings(request);
    }
docs: Lists [KeyRings][google.cloud.kms.v1.KeyRing].
  
  <p>Sample code:
  
  <pre><code>
  try (KeyManagementServiceClient keyManagementServiceClient = KeyManagementServiceClient.create()) {
  LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
  for (KeyRing element : keyManagementServiceClient.listKeyRings(parent).iterateAll()) {
  // doThingsWith(element);
  }
  }
  </code></pre>
  
  @param parent Required. The resource name of the location associated with the
  [KeyRings][google.cloud.kms.v1.KeyRing], in the format `projects/&#42;/locations/&#42;`.
  @throws com.google.api.gax.rpc.ApiException if the remote call fails