code: func (opt Options) New(c context.Context) output.Output {
  	o := fileOutput{
  		Context: c,
  		Options: &opt,
  		streams: map[types.StreamPath]*stream{},
  	}
  	if opt.Track {
  		o.et = &output.EntryTracker{}
  	}
  	return &o
  }
docs: // New creates a new file Output from the specified Options.