in FBRetainCycleDetector/Associations/FBAssociationManager.mm [134:141]
static void fb_objc_removeAssociatedObjects(id object) {
{
std::lock_guard<std::mutex> l(*_associationMutex);
_threadUnsafeRemoveAssociations(object);
}
fb_orig_objc_removeAssociatedObjects(object);
}