updateChild method
override
Copied from SliverMultiBoxAdaptorElement.updateChild.
Implementation
@override
Element updateChild(
final Element child, final Widget newWidget, final dynamic newSlot) {
final oldParentData =
child?.renderObject?.parentData as SliverMultiBoxAdaptorParentData;
final newChild = super.updateChild(child, newWidget, newSlot);
final newParentData =
newChild?.renderObject?.parentData as SliverMultiBoxAdaptorParentData;
// Preserve the old layoutOffset if the renderObject was swapped out.
if (oldParentData != newParentData &&
oldParentData != null &&
newParentData != null) {
newParentData.layoutOffset = oldParentData.layoutOffset;
}
return newChild;
}