remove method
Removes child.
Implementation
void remove(RenderBox child) {
final wasOwned =
identical(child.parent, this) &&
children.any((candidate) => identical(candidate, child));
try {
dropChild(child);
} finally {
if (wasOwned &&
child.parent == null &&
!children.any((candidate) => identical(candidate, child))) {
_childrenData.remove(child);
}
}
}