removeChild method
Removes the child element corresponding with the given RenderBox.
Implementation
@override
void removeChild(RenderBox? child) {
final int? index = renderObject.indexOf(child!);
owner!.buildScope(this, () {
assert(_childElements.containsKey(index));
final Element? result = updateChild(_childElements[index], null, index);
assert(result == null);
_childElements.remove(index);
assert(!_childElements.containsKey(index));
});
}