code: public ServiceFuture<ExpressRouteCrossConnectionInner> getByResourceGroupAsync(String resourceGroupName, String crossConnectionName, final ServiceCallback<ExpressRouteCrossConnectionInner> serviceCallback) {
          return ServiceFuture.fromResponse(getByResourceGroupWithServiceResponseAsync(resourceGroupName, crossConnectionName), serviceCallback);
      }
docs: Gets details about the specified ExpressRouteCrossConnection.
  
  @param resourceGroupName The name of the resource group (peering location of the circuit).
  @param crossConnectionName The name of the ExpressRouteCrossConnection (service key of the circuit).
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object