class ActionDispatch::Routing::Mapper::Mapping

def route_source_location

def route_source_location
  if Mapper.route_source_locations
    action_dispatch_dir = File.expand_path("..", __dir__)
    caller_location = caller_locations.find { |location| !location.path.include?(action_dispatch_dir) }
    cleaned_path = Mapper.backtrace_cleaner.clean([caller_location.path]).first
    "#{cleaned_path}:#{caller_location.lineno}" if cleaned_path
  end
end