example.js

Cities.statics = {
  async routerWillRun(state, flux) {
    return await flux.getActions('cities').getAll()
  }
}

performRouteHandlerStaticMethod.js

function performRouteHandlerStaticMethod(routes, methodName, ...args) {
  return Promise.all(routes
    .map(route => route.handler.statics && route.handler.statics[methodName])
    .filter(method => typeof method === 'function')
    .map(method => method(...args))
  )
}

export default performRouteHandlerStaticMethod