openTrailing method
Programmatically opens the trailing actions.
Implementation
void openTrailing({bool animated = true}) {
if (!mounted || widget.trailingActions.isEmpty) return;
final totalWidth = _totalStandardWidth(widget.trailingActions.length);
final isRtl = Directionality.of(context) == TextDirection.rtl;
final target = isRtl ? totalWidth : -totalWidth;
_scope?.registerOpenRow(this);
_animateTo(target, animated: animated);
}