def __init__(self, rootId, depthToCheck=None):
        self._rootId = rootId
        self._depthToCheck = -1

        if depthToCheck is not None:
            self._depthToCheck = depthToCheck
Constructs a criteria that accepts the drag if the targeted Item
dataset/ETHPy150Open rwl/muntjac/muntjac/ui/tree.py/TargetInSubtree.__init__