def __init__(self, classifier: "ClassifierDecisionTree", verbose: bool = True) -> None:
        """
        Create robustness verification for a decision-tree-based classifier.

        :param classifier: A trained decision-tree-based classifier.
        :param verbose: Show progress bars.
        """
        self._classifier = classifier
        self.verbose = verbose
        self._trees = self._classifier.get_trees()

        Create robustness verification for a decision-tree-based classifier.

        :param classifier: A trained decision-tree-based classifier.
        :param verbose: Show progress bars.
        
art/metrics/verification_decisions_trees.py