code: @BetaApi
    public final Operation insertTargetVpnGateway(
        String region, TargetVpnGateway targetVpnGatewayResource) {
  
      InsertTargetVpnGatewayHttpRequest request =
          InsertTargetVpnGatewayHttpRequest.newBuilder()
              .setRegion(region)
              .setTargetVpnGatewayResource(targetVpnGatewayResource)
              .build();
      return insertTargetVpnGateway(request);
    }
docs: Creates a target VPN gateway in the specified project and region using the data included in the
  request.
  
  <p>Sample code:
  
  <pre><code>
  try (TargetVpnGatewayClient targetVpnGatewayClient = TargetVpnGatewayClient.create()) {
  ProjectRegionName region = ProjectRegionName.of("[PROJECT]", "[REGION]");
  TargetVpnGateway targetVpnGatewayResource = TargetVpnGateway.newBuilder().build();
  Operation response = targetVpnGatewayClient.insertTargetVpnGateway(region.toString(), targetVpnGatewayResource);
  }
  </code></pre>
  
  @param region Name of the region for this request.
  @param targetVpnGatewayResource Represents a Target VPN gateway resource. (== resource_for
  beta.targetVpnGateways ==) (== resource_for v1.targetVpnGateways ==)
  @throws com.google.api.gax.rpc.ApiException if the remote call fails