code: public void unregister(String vaultName, String resourceGroupName, String fabricName, String containerName) {
          unregisterWithServiceResponseAsync(vaultName, resourceGroupName, fabricName, containerName).toBlocking().single().body();
      }
docs: Unregisters the given container from your Recovery Services Vault.
  This is an asynchronous operation. To determine whether the backend service has finished processing the request, call Get Container Operation Result API.
  
  @param vaultName The name of the recovery services vault.
  @param resourceGroupName The name of the resource group where the recovery services vault is present.
  @param fabricName Name of the fabric where the container belongs.
  @param containerName Name of the container which needs to be unregistered from the Recovery Services Vault.
  @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