setHandlesVisible method
Implementation
void setHandlesVisible(bool visible) {
if (handlesVisible == visible) {
return;
}
handlesVisible = visible;
if (SchedulerBinding.instance.schedulerPhase ==
SchedulerPhase.persistentCallbacks) {
SchedulerBinding.instance.addPostFrameCallback(markNeedsBuild);
} else {
markNeedsBuild();
}
}