code: public Observable<Page<ActivityInner>> listByModuleAsync(final String resourceGroupName, final String automationAccountName, final String moduleName) {
          return listByModuleWithServiceResponseAsync(resourceGroupName, automationAccountName, moduleName)
              .map(new Func1<ServiceResponse<Page<ActivityInner>>, Page<ActivityInner>>() {
                  @Override
                  public Page<ActivityInner> call(ServiceResponse<Page<ActivityInner>> response) {
                      return response.body();
                  }
              });
      }
docs: Retrieve a list of activities in the module identified by module name.
  
  @param resourceGroupName Name of an Azure Resource group.
  @param automationAccountName The name of the automation account.
  @param moduleName The name of module.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the PagedList&lt;ActivityInner&gt; object