tooltipTriggerWhenLabelHidden property
Overrides tooltipTrigger specifically when the destination label is currently hidden (e.g., when labelType is NavigationRailLabelType.none and showLabelsWhenCollapsed is false).
When non-null, takes precedence over tooltipTrigger for the label-hidden state.
Implementation
final TooltipTriggerMode? tooltipTriggerWhenLabelHidden;