public final UnaryCallable<UpdateSubnetRequest, Operation> updateSubnetCallable() {
    return stub.updateSubnetCallable();
  }
Updates the parameters of a single subnet. Only fields specified in `update_mask` are applied.

<p>&#42;Note&#42;: This API is synchronous and always returns a successful
`google.longrunning.Operation` (LRO). The returned LRO will only have `done` and `response`
fields.

<p>Sample code:

<pre>{@code
// This snippet has been automatically generated and should be regarded as a code template only.
// It will require modifications to work:
// - It may require correct/in-range values for request initialization.
// - It may require specifying regional endpoints when creating the service client as shown in
// https://cloud.google.com/java/docs/setup#configure_endpoints_for_the_client_library
try (VmwareEngineClient vmwareEngineClient = VmwareEngineClient.create()) {
  UpdateSubnetRequest request =
      UpdateSubnetRequest.newBuilder()
          .setUpdateMask(FieldMask.newBuilder().build())
          .setSubnet(Subnet.newBuilder().build())
          .build();
  ApiFuture<Operation> future = vmwareEngineClient.updateSubnetCallable().futureCall(request);
  // Do something.
  Operation response = future.get();
}
}</pre>
java-vmwareengine/google-cloud-vmwareengine/src/main/java/com/google/cloud/vmwareengine/v1/VmwareEngineClient.java