def __len__(self):
        return self.database.llen(self.key)
Returns True if a node allows an object to be dropped onto it.
dataset/ETHPy150Open coleifer/walrus/walrus/containers.py/List.__len__--crossover with--dataset/ETHPy150Open enthought/pyface/pyface/tree/node_tree_model.py/NodeTreeModel.can_drop