dispose method

void dispose()

Implementation

void dispose() {
  if (_disposed) return;
  _disposed = true;
  _ownerState = _OwnerState.disposed;
  _ownerFlight = null;
  _owner?.removeListener(_onSemanticsChanged);
  _owner = null;
  _semanticsHandle?.dispose();
  _semanticsHandle = null;
  _entries.clear();
}