reportSearchBarHeight method
Calibrates the search bar collapse distance to the actual rendered height.
Called automatically by GlassLargeTitle after first layout when a
searchBar widget is provided. You do not normally need to call this.
Implementation
void reportSearchBarHeight(double height) {
if (height > 0 && height != _searchBarHeight) {
_searchBarHeight = height;
_updateState();
}
}