public com.google.common.util.concurrent.ListenableFuture<com.google.longrunning.Operation>
        updateExternalAccessRule(
            com.google.cloud.vmwareengine.v1.UpdateExternalAccessRuleRequest request) {
      return io.grpc.stub.ClientCalls.futureUnaryCall(
          getChannel().newCall(getUpdateExternalAccessRuleMethod(), getCallOptions()), request);
    }
<pre>
Updates the parameters of a single external access rule.
Only fields specified in `update_mask` are applied.
</pre>
java-vmwareengine/grpc-google-cloud-vmwareengine-v1/src/main/java/com/google/cloud/vmwareengine/v1/VmwareEngineGrpc.java