code: public VirtualNetworkInner getByResourceGroup(String resourceGroupName, String virtualNetworkName) {
          return getByResourceGroupWithServiceResponseAsync(resourceGroupName, virtualNetworkName).toBlocking().single().body();
      }
docs: Gets the specified virtual network by resource group.
  
  @param resourceGroupName The name of the resource group.
  @param virtualNetworkName The name of the virtual network.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws CloudException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the VirtualNetworkInner object if successful.