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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _find_dependant_trees(self, tree_obj):
 """ returns list of trees that are dependent_on given tree_obj """

        dependant_trees = []
        for tree_name, tree in self.trees.items():
            if tree_obj in tree.dependent_on:
                dependant_trees.append(tree)
        return dependant_trees