Selection descriptor reused by <fb-library-tree> / <fb-library-filesystem-tree> events. Carries the row key and any album identity or member references needed by theme actions.
<fb-library-tree>
<fb-library-filesystem-tree>
Optional
Opaque album identity; pass it to the tree's addToPlaylist options.
addToPlaylist
Exact members of an artist's album row; an empty array means no tracks.
Selection descriptor reused by
<fb-library-tree>/<fb-library-filesystem-tree>events. Carries the row key and any album identity or member references needed by theme actions.