const asyncWrapper=function(instance,wrapper) {
  return function(object) {
    switch (typeof object) {
      case 'function':
        break
      case 'object': {
        let keys=Object.keys(object)
        keys.forEach(key => {
          Object.defineProperty(instance,key,{
            get: wrapper.call(instance,key,object[key])
          })
        })
      }
        break
      default:
    }
    return instance
  }
}

export default (instance,data) => asyncWrapper(instance,(name,value) => {
  instance.loading(name,false)
  return () => {
    if (typeof value=='string') {
      return instance.get(value)
    }
    let result=value(instance)
    return result
  }
})