code: func (r *Repository) Notes() (storer.ReferenceIter, error) {
  	refIter, err := r.Storer.IterReferences()
  	if err != nil {
  		return nil, err
  	}
  
  	return storer.NewReferenceFilteredIter(
  		func(r *plumbing.Reference) bool {
  			return r.Name().IsNote()
  		}, refIter), nil
  }
docs: // Notes returns all the References that are notes. For more information:
  // https://git-scm.com/docs/git-notes