code: function BufStream(lvlup) {
    if (!(this instanceof BufStream)) return new BufStream(lvlup)
  
    this.pending = []
    this.open = false
  
    if (typeof lvlup == "object" && lvlup.db) {
      if (lvlup.isOpen()) {
        this.db = lvlup.db
        this.open = true
      }
      else
        lvlup.once("ready", this._go.bind(this, lvlup))
    }
    else
      throw new Error("Please provide a LevelUP instance")
  }
docs: Return an object that provides read and write streams to a LevelUP instance. Streams multibuffers of key/value pairs.
  @param {LevelUP instance} lvlup    A LevelUp instance.
  @param {object} options Options to send to LevelDOWN when opening or creating the database.