collapseTrailing method

void collapseTrailing()

Collapse the trailing pane.

Implementation

void collapseTrailing() {
  if (_isTrailingCollapsed) return;
  _savedRatio = _ratio ?? 0.5;
  _isTrailingCollapsed = true;
  _isLeadingCollapsed = false;
  _ratio = 1.0;
  _leadingExtent = null;
  notifyListeners();
}