export default (instance,data) => (...params) => {
  switch (params.length) {
    case 0: {
      return instance.defaultState
    }
    case 1: {
      let [input]=params
      if (typeof input=='object') {
        let defaultState=input
        data.defaultState=defaultState
        return instance
      }
      return data.defaultState[input]
    }

    case 2: {
      let [defaultName,value]=params
      data.defaultState[defaultName]=value
    }

  }
  return instance
}