code: public Observable<Void> addAsync(String resourceGroupName, String accountName, String storageAccountName, AddStorageAccountParameters parameters) {
          return addWithServiceResponseAsync(resourceGroupName, accountName, storageAccountName, parameters).map(new Func1<ServiceResponse<Void>, Void>() {
              @Override
              public Void call(ServiceResponse<Void> response) {
                  return response.body();
              }
          });
      }
docs: Updates the specified Data Lake Analytics account to add an Azure Storage account.
  
  @param resourceGroupName The name of the Azure resource group.
  @param accountName The name of the Data Lake Analytics account.
  @param storageAccountName The name of the Azure Storage account to add
  @param parameters The parameters containing the access key and optional suffix for the Azure Storage Account.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceResponse} object if successful.