def _used_reserved_keys(self, data):
        return set(data.keys()) & set(self.RESERVED_NAMES)
construct a tree from the tagged workflows in a loaded vistrail
dataset/ETHPy150Open Relrin/aiorest-ws/aiorest_ws/auth/token/managers.py/JSONWebTokenManager._used_reserved_keys--crossover with--dataset/ETHPy150Open VisTrails/VisTrails/vistrails/gui/collection/workspace.py/QVistrailList.make_tree