docs: @BetaApi
    public final TargetVpnGateway getTargetVpnGateway(
        ProjectRegionTargetVpnGatewayName targetVpnGateway) {
  
      GetTargetVpnGatewayHttpRequest request =
          GetTargetVpnGatewayHttpRequest.newBuilder()
              .setTargetVpnGateway(targetVpnGateway == null ? null : targetVpnGateway.toString())
              .build();
      return getTargetVpnGateway(request);
    }