code: public Observable<DataLakeAnalyticsAccountInner> getByResourceGroupAsync(String resourceGroupName, String accountName) {
          return getByResourceGroupWithServiceResponseAsync(resourceGroupName, accountName).map(new Func1<ServiceResponse<DataLakeAnalyticsAccountInner>, DataLakeAnalyticsAccountInner>() {
              @Override
              public DataLakeAnalyticsAccountInner call(ServiceResponse<DataLakeAnalyticsAccountInner> response) {
                  return response.body();
              }
          });
      }
docs: Gets details of the specified Data Lake Analytics account.
  
  @param resourceGroupName The name of the Azure resource group that contains the Data Lake Analytics account.
  @param accountName The name of the Data Lake Analytics account to retrieve.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the DataLakeAnalyticsAccountInner object