code: public Observable<Page<UserInner>> listAsync(final String resourceGroupName, final String labAccountName, final String labName, final String expand, final String filter, final Integer top, final String orderby) {
          return listWithServiceResponseAsync(resourceGroupName, labAccountName, labName, expand, filter, top, orderby)
              .map(new Func1<ServiceResponse<Page<UserInner>>, Page<UserInner>>() {
                  @Override
                  public Page<UserInner> call(ServiceResponse<Page<UserInner>> response) {
                      return response.body();
                  }
              });
      }
docs: List users 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.
  @param expand Specify the $expand query. Example: 'properties($select=email)'
  @param filter The filter to apply to the operation.
  @param top The maximum number of resources to return from the operation.
  @param orderby The ordering expression for the results, using OData notation.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;UserInner&gt; object