code: public ServiceFuture<VpnClientIPsecParametersInner> beginGetVpnclientIpsecParametersAsync(String resourceGroupName, String virtualNetworkGatewayName, final ServiceCallback<VpnClientIPsecParametersInner> serviceCallback) {
          return ServiceFuture.fromResponse(beginGetVpnclientIpsecParametersWithServiceResponseAsync(resourceGroupName, virtualNetworkGatewayName), serviceCallback);
      }
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.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object