code: public ServiceFuture<ManagedClusterInner> getByResourceGroupAsync(String resourceGroupName, String resourceName, final ServiceCallback<ManagedClusterInner> serviceCallback) {
          return ServiceFuture.fromResponse(getByResourceGroupWithServiceResponseAsync(resourceGroupName, resourceName), serviceCallback);
      }
docs: Gets a managed cluster.
  Gets the details of the managed cluster with a specified resource group and name.
  
  @param resourceGroupName The name of the resource group.
  @param resourceName The name of the managed cluster resource.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object