selectionMode property
The panel-wide selection mode.
Governs flat (non-categorized) entries directly and acts as the fallback for any SelectCategoryEntry that leaves its SelectCategoryEntry.selectionMode null.
In SelectionMode.single, selecting a leaf deselects every other category's selections (cross-category exclusion) and applies immediately instead of waiting for the apply action. In SelectionMode.multiple, selections accumulate until applied.
Implementation
final SelectionMode selectionMode;