code: public Observable<ProtectedItemResourceInner> getAsync(String vaultName, String resourceGroupName, String fabricName, String containerName, String protectedItemName, String operationId) {
          return getWithServiceResponseAsync(vaultName, resourceGroupName, fabricName, containerName, protectedItemName, operationId).map(new Func1<ServiceResponse<ProtectedItemResourceInner>, ProtectedItemResourceInner>() {
              @Override
              public ProtectedItemResourceInner call(ServiceResponse<ProtectedItemResourceInner> response) {
                  return response.body();
              }
          });
      }
docs: Gets the result of any operation on the backup item.
  
  @param vaultName The name of the Recovery Services vault.
  @param resourceGroupName The name of the resource group associated with the Recovery Services vault.
  @param fabricName The fabric name associated with the backup item.
  @param containerName The container name associated with the backup item.
  @param protectedItemName The name of backup item used in this GET operation.
  @param operationId The OperationID used in this GET operation.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the ProtectedItemResourceInner object