code: @BetaApi
    public final Operation setBackendServiceTargetTcpProxy(
        String targetTcpProxy,
        TargetTcpProxiesSetBackendServiceRequest targetTcpProxiesSetBackendServiceRequestResource) {
  
      SetBackendServiceTargetTcpProxyHttpRequest request =
          SetBackendServiceTargetTcpProxyHttpRequest.newBuilder()
              .setTargetTcpProxy(targetTcpProxy)
              .setTargetTcpProxiesSetBackendServiceRequestResource(
                  targetTcpProxiesSetBackendServiceRequestResource)
              .build();
      return setBackendServiceTargetTcpProxy(request);
    }
docs: Changes the BackendService for TargetTcpProxy.
  
  <p>Sample code:
  
  <pre><code>
  try (TargetTcpProxyClient targetTcpProxyClient = TargetTcpProxyClient.create()) {
  ProjectGlobalTargetTcpProxyName targetTcpProxy = ProjectGlobalTargetTcpProxyName.of("[PROJECT]", "[TARGET_TCP_PROXY]");
  TargetTcpProxiesSetBackendServiceRequest targetTcpProxiesSetBackendServiceRequestResource = TargetTcpProxiesSetBackendServiceRequest.newBuilder().build();
  Operation response = targetTcpProxyClient.setBackendServiceTargetTcpProxy(targetTcpProxy.toString(), targetTcpProxiesSetBackendServiceRequestResource);
  }
  </code></pre>
  
  @param targetTcpProxy Name of the TargetTcpProxy resource whose BackendService resource is to
  be set.
  @param targetTcpProxiesSetBackendServiceRequestResource
  @throws com.google.api.gax.rpc.ApiException if the remote call fails