code: @BetaApi
    public final Operation deleteTargetVpnGateway(String targetVpnGateway) {
  
      DeleteTargetVpnGatewayHttpRequest request =
          DeleteTargetVpnGatewayHttpRequest.newBuilder()
              .setTargetVpnGateway(targetVpnGateway)
              .build();
      return deleteTargetVpnGateway(request);
    }
docs: Deletes the specified target VPN gateway.
  
  <p>Sample code:
  
  <pre><code>
  try (TargetVpnGatewayClient targetVpnGatewayClient = TargetVpnGatewayClient.create()) {
  ProjectRegionTargetVpnGatewayName targetVpnGateway = ProjectRegionTargetVpnGatewayName.of("[PROJECT]", "[REGION]", "[TARGET_VPN_GATEWAY]");
  Operation response = targetVpnGatewayClient.deleteTargetVpnGateway(targetVpnGateway.toString());
  }
  </code></pre>
  
  @param targetVpnGateway Name of the target VPN gateway to delete.
  @throws com.google.api.gax.rpc.ApiException if the remote call fails