def create_or_update(resource_group_name, route_filter_name, route_filter_parameters, custom_headers:nil)
      response = create_or_update_async(resource_group_name, route_filter_name, route_filter_parameters, custom_headers:custom_headers).value!
      response.body unless response.nil?
    end
def create_or_update(resource_group_name, route_filter_name, route_filter_parameters, custom_headers:nil)
      response = create_or_update_async(resource_group_name, route_filter_name, route_filter_parameters, custom_headers:custom_headers).value!
      response.body unless response.nil?
    end
Creates or updates a route filter in a specified resource group.

 @param resource_group_name [String] The name of the resource group.
 @param route_filter_name [String] The name of the route filter.
 @param route_filter_parameters [RouteFilter] Parameters supplied to the
 create or update route filter operation.
 @param custom_headers [Hash{String => String}] A hash of custom headers that
 will be added to the HTTP request.

 @return [RouteFilter] operation results.