@classmethod
    def exists(cls, field):
        return cls(exists={'field': field})
Return a range tuple (string, string) for the given input name.  Workflow
dataset/ETHPy150Open ooici/elasticpy/elasticpy/filter.py/ElasticFilter.exists--crossover with--dataset/ETHPy150Open andrew-gardner/dependsworkflow/depends/depends_node.py/DagNode.inputRange