code: public Observable<DataLakeAnalyticsAccountInner> beginUpdateAsync(String resourceGroupName, String name, DataLakeAnalyticsAccountInner parameters) {
          return beginUpdateWithServiceResponseAsync(resourceGroupName, name, parameters).map(new Func1<ServiceResponse<DataLakeAnalyticsAccountInner>, DataLakeAnalyticsAccountInner>() {
              @Override
              public DataLakeAnalyticsAccountInner call(ServiceResponse<DataLakeAnalyticsAccountInner> response) {
                  return response.body();
              }
          });
      }
docs: Updates the Data Lake Analytics account object specified by the accountName with the contents of the account object.
  
  @param resourceGroupName The name of the Azure resource group that contains the Data Lake Analytics account.
  @param name The name of the Data Lake Analytics account to update.
  @param parameters Parameters supplied to the update Data Lake Analytics account operation.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the DataLakeAnalyticsAccountInner object