dispose method

void dispose()

Clean up resources and clear all active notifications

Implementation

void dispose() {
  // Remove all active notifications
  for (final entry in _activeToastrs.values) {
    entry.remove();
  }
  _activeToastrs.clear();
  _duplicateKeys.clear();

  // Reset state
  _notificationCount = 0;
  _lastResetTime = DateTime.now();
}