code: function ReadableAsyncKit()
  {
    ReadableAsyncKit.super_.apply(this, arguments);
  
    // list of active jobs
    this.jobs = {};
  
    // add stream methods
    this.destroy = destroy;
    this._start  = _start;
    this._read   = _read;
  }
docs: Base constructor for all streams
  used to hold properties/methods