tryExpandSize method
Implementation
bool tryExpandSize(double size,
    [PanelSibling direction = PanelSibling.both]) {
  assert(_paneState != null, 'ResizablePaneController is not attached');
  return _paneState!.tryExpandSize(size, direction);
}bool tryExpandSize(double size,
    [PanelSibling direction = PanelSibling.both]) {
  assert(_paneState != null, 'ResizablePaneController is not attached');
  return _paneState!.tryExpandSize(size, direction);
}