placeholder property

String? placeholder
final

What the BLANK choice means, in the panel's own words — not decoration. A TrashedFilter publishes "Without trashed" here, and its blank branch really is withoutTrashed() (vendor TrashedFilter.php:27-31), so a client that renders a generic "Any" over it tells the user the filter was removed when it was not. Null when the node declares none, which is the ordinary case — then the blank row genuinely is "any".

Implementation

final String? placeholder;