async def corofunc():
            nonlocal called
            called += 1
            raise ValueError("yeah async")
def __init__(self, root, cwd, badfn=None, relativeuipath=True):
        self._root = root
        self._cwd = cwd
        if badfn is not None:
            self.bad = badfn
        self._relativeuipath = relativeuipath