code: public WorkflowTriggerCallbackUrlInner listCallbackUrl(String resourceGroupName, String workflowName, GetCallbackUrlParameters listCallbackUrl) {
          return listCallbackUrlWithServiceResponseAsync(resourceGroupName, workflowName, listCallbackUrl).toBlocking().single().body();
      }
docs: Get the workflow callback Url.
  
  @param resourceGroupName The resource group name.
  @param workflowName The workflow name.
  @param listCallbackUrl Which callback url to list.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws CloudException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the WorkflowTriggerCallbackUrlInner object if successful.