code: public Observable<Page<EnvironmentSettingInner>> listAsync(final String resourceGroupName, final String labAccountName, final String labName) {
          return listWithServiceResponseAsync(resourceGroupName, labAccountName, labName)
              .map(new Func1<ServiceResponse<Page<EnvironmentSettingInner>>, Page<EnvironmentSettingInner>>() {
                  @Override
                  public Page<EnvironmentSettingInner> call(ServiceResponse<Page<EnvironmentSettingInner>> response) {
                      return response.body();
                  }
              });
      }
docs: List environment setting in a given lab.
  
  @param resourceGroupName The name of the resource group.
  @param labAccountName The name of the lab Account.
  @param labName The name of the lab.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;EnvironmentSettingInner&gt; object