def METHOD_NAME(folder, watch):
    '''If folder is a parent of watched folders, migrate those handlers to this watch'''
    for (_handler, _watch), (_folder, _name) in list(handlers.items()):
        if _folder.startswith(folder) and _folder != folder:
            del handlers[_handler, _watch]
            observer.remove_handler_for_watch(_handler, _watch)
            handlers[_handler, watch] = (folder, _name)
            observer.add_handler_for_watch(_handler, watch)