didFinishLayout method
override
Called at the end of layout to indicate that layout is now complete.
Implementation
@override
void didFinishLayout() {
assert(debugAssertChildListLocked());
final int firstIndex = _childElements.firstKey() ?? 0;
final int lastIndex = _childElements.lastKey() ?? 0;
(widget as SliverMultiBoxAdaptorWidget).delegate.didFinishLayout(firstIndex, lastIndex);
}