code: public Observable<LabAccountInner> getByResourceGroupAsync(String resourceGroupName, String labAccountName, String expand) {
          return getByResourceGroupWithServiceResponseAsync(resourceGroupName, labAccountName, expand).map(new Func1<ServiceResponse<LabAccountInner>, LabAccountInner>() {
              @Override
              public LabAccountInner call(ServiceResponse<LabAccountInner> response) {
                  return response.body();
              }
          });
      }
docs: Get lab account.
  
  @param resourceGroupName The name of the resource group.
  @param labAccountName The name of the lab Account.
  @param expand Specify the $expand query. Example: 'properties($expand=sizeConfiguration)'
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the LabAccountInner object