public final OperationFuture<HcxActivationKey, OperationMetadata> createHcxActivationKeyAsync(
      PrivateCloudName parent, HcxActivationKey hcxActivationKey, String hcxActivationKeyId) {
    CreateHcxActivationKeyRequest request =
        CreateHcxActivationKeyRequest.newBuilder()
            .setParent(parent == null ? null : parent.toString())
            .setHcxActivationKey(hcxActivationKey)
            .setHcxActivationKeyId(hcxActivationKeyId)
            .build();
    return createHcxActivationKeyAsync(request);
  }
Creates a new HCX activation key in a given private cloud.

<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()) {
  PrivateCloudName parent = PrivateCloudName.of("[PROJECT]", "[LOCATION]", "[PRIVATE_CLOUD]");
  HcxActivationKey hcxActivationKey = HcxActivationKey.newBuilder().build();
  String hcxActivationKeyId = "hcxActivationKeyId-645871673";
  HcxActivationKey response =
      vmwareEngineClient
          .createHcxActivationKeyAsync(parent, hcxActivationKey, hcxActivationKeyId)
          .get();
}
}</pre>

@param parent Required. The resource name of the private cloud to create the key for. Resource
    names are schemeless URIs that follow the conventions in
    https://cloud.google.com/apis/design/resource_names. For example:
    `projects/my-project/locations/us-central1/privateClouds/my-cloud`
@param hcxActivationKey Required. The initial description of a new HCX activation key. When
    creating a new key, this field must be an empty object.
@param hcxActivationKeyId Required. The user-provided identifier of the `HcxActivationKey` to
    be created. This identifier must be unique among `HcxActivationKey` resources within the
    parent and becomes the final token in the name URI. The identifier must meet the following
    requirements:
    <ul>
      <li>Only contains 1-63 alphanumeric characters and hyphens
      <li>Begins with an alphabetical character
      <li>Ends with a non-hyphen character
      <li>Not formatted as a UUID
      <li>Complies with [RFC 1034](https://datatracker.ietf.org/doc/html/rfc1034) (section 3.5)
    </ul>

@throws com.google.api.gax.rpc.ApiException if the remote call fails
java-vmwareengine/google-cloud-vmwareengine/src/main/java/com/google/cloud/vmwareengine/v1/VmwareEngineClient.java