public final OperationCallable<
          CreateExternalAccessRuleRequest, ExternalAccessRule, OperationMetadata>
      createExternalAccessRuleOperationCallable() {
    return stub.createExternalAccessRuleOperationCallable();
  }
Creates a new external access rule in a given network policy.

<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()) {
  CreateExternalAccessRuleRequest request =
      CreateExternalAccessRuleRequest.newBuilder()
          .setParent(
              NetworkPolicyName.of("[PROJECT]", "[LOCATION]", "[NETWORK_POLICY]").toString())
          .setExternalAccessRule(ExternalAccessRule.newBuilder().build())
          .setExternalAccessRuleId("externalAccessRuleId1937389350")
          .setRequestId("requestId693933066")
          .build();
  OperationFuture<ExternalAccessRule, OperationMetadata> future =
      vmwareEngineClient.createExternalAccessRuleOperationCallable().futureCall(request);
  // Do something.
  ExternalAccessRule response = future.get();
}
}</pre>
java-vmwareengine/google-cloud-vmwareengine/src/main/java/com/google/cloud/vmwareengine/v1/VmwareEngineClient.java