public void unrelateAcrossR19From(Shape_c target, boolean notifyChanges) {
if (target != null) {
target.unrelateAcrossR19From(this, notifyChanges);
}
}
public void unrelateAcrossR19From(Shape_c target) {
if (target != null) {
target.unrelateAcrossR19From(this, true);
}
}