code: public List<WorkbookInner> listByResourceGroup(String resourceGroupName, CategoryType category) {
          return listByResourceGroupWithServiceResponseAsync(resourceGroupName, category).toBlocking().single().body();
      }
docs: Get all Workbooks defined within a specified resource group and category.
  
  @param resourceGroupName The name of the resource group.
  @param category Category of workbook to return. Possible values include: 'workbook', 'TSG', 'performance', 'retention'
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws WorkbookErrorException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the List&lt;WorkbookInner&gt; object if successful.