Search trees by `path`.

        Args:
            path (str): :attr:`.Tree.path` property of :class:`.Tree`.

        Returns:
            set: Set of matching :class:`Tree` instances.

def trees_by_path(self, path):
        """
        Search trees by `path`.

        Args:
            path (str): :attr:`.Tree.path` property of :class:`.Tree`.

        Returns:
            set: Set of matching :class:`Tree` instances.
        """
        return set(
            self.path_db.get(path, OOSet()).keys()
        )