code: public Observable<VpnClientIPsecParametersInner> getVpnclientIpsecParametersAsync(String resourceGroupName, String virtualNetworkGatewayName) {
          return getVpnclientIpsecParametersWithServiceResponseAsync(resourceGroupName, virtualNetworkGatewayName).map(new Func1<ServiceResponse<VpnClientIPsecParametersInner>, VpnClientIPsecParametersInner>() {
              @Override
              public VpnClientIPsecParametersInner call(ServiceResponse<VpnClientIPsecParametersInner> response) {
                  return response.body();
              }
          });
      }
docs: The Get VpnclientIpsecParameters operation retrieves information about the vpnclient ipsec policy for P2S client of virtual network gateway in the specified resource group through Network resource provider.
  
  @param resourceGroupName The name of the resource group.
  @param virtualNetworkGatewayName The virtual network gateway name.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable for the request