@property
    def expression(self):
        return self
Perform is_fitted validation for estimator.
dataset/ETHPy150Open goFrendiAsgard/kokoropy/kokoropy/packages/sqlalchemy/sql/elements.py/ColumnElement.expression--crossover with--dataset/ETHPy150Open scikit-learn/scikit-learn/sklearn/utils/validation.py/check_is_fitted