def popPosition(self, holdPosition):
        index = self.positionStack.pop()
        if (not holdPosition):
            self.peekIndex = index
        return holdPosition
DFS on a grid, mark connected component, iterative version
dataset/ETHPy150Open tabatkins/bikeshed/bikeshed/widlparser/widlparser/tokenizer.py/Tokenizer.popPosition--crossover with--dataset/ETHPy150Open jilljenn/tryalgo/tryalgo/dfs.py/dfs_grid