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

        if depthToCheck is not None:
            self._depthToCheck = depthToCheck
Tests that exactly N items in an iterable are "truthy" (neither None,
dataset/ETHPy150Open rwl/muntjac/muntjac/ui/tree.py/TargetInSubtree.__init__--crossover with--dataset/ETHPy150Open saltstack/salt/salt/utils/__init__.py/exactly_n