code: public List<ProtectionContainerResourceInner> list(String vaultName, String resourceGroupName, String filter) {
          return listWithServiceResponseAsync(vaultName, resourceGroupName, filter).toBlocking().single().body();
      }
docs: Lists the containers registered to the Recovery Services vault.
  
  @param vaultName The name of the Recovery Services vault.
  @param resourceGroupName The name of the resource group associated with the Recovery Services vault.
  @param filter The following equation is used to sort or filter the containers registered to the vault. providerType eq {AzureIaasVM, MAB, DPM, AzureBackupServer, AzureSql} and status eq {Unknown, NotRegistered, Registered, Registering} and friendlyName eq {containername} and backupManagementType eq {AzureIaasVM, MAB, DPM, AzureBackupServer, AzureSql}.
  @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 List&lt;ProtectionContainerResourceInner&gt; object if successful.