function customRoute (options) {
  const meta = { ...options.meta, __custom: true }
  const route = { ...options, meta }
  if (Array.isArray(options.children)) {
    route.children = options.children.map(customRoute)
  }
  return route
}
Flag custom routes to not fetch GraphQL results or context for them.
TODO: This might be unnecessary once static routes are lazy-loaded.