def copy(self):
        node = super(EnamlDefNode, self).copy()
        node.update_id_nodes()
        return node
Set the projection to include only keys.
dataset/ETHPy150Open nucleic/enaml/enaml/core/compiler_nodes.py/EnamlDefNode.copy--crossover with--dataset/ETHPy150Open GoogleCloudPlatform/gcloud-python/gcloud/datastore/query.py/Query.keys_only