pushNow method
Capture and push NOW — a delta against the last pushed tree, or a full baseline only when there is none. For callers that need the capture to have happened before they continue (lifecycle flushes), without forcing the receiver to replace an up-to-date tree each time.
Implementation
Future<void> pushNow() {
_debouncer?.cancel();
_debouncer = null;
_firstScheduledAt = null;
return _captureAndPush(force: false);
}