41     /// Assume matchers `['path:foo/bar', 'rootfilesin:qux']`, we would

    41     /// Assume matchers `['path:foo/bar', 'rootfilesin:qux']`, we would

    42     /// return the following values (assuming the implementation of

    42     /// return the following values (assuming the implementation of

    43     /// visit_children_set is capable of recognizing this; some implementations

    43     /// visit_children_set is capable of recognizing this; some implementations

    44     /// are not).

    44     /// are not).

    45     ///

    45     ///

    46     /// ```ignore

    47     /// ```ignore

    47     /// '' -> {'foo', 'qux'}

    48     /// '' -> {'foo', 'qux'}

    48     /// 'baz' -> set()

    49     /// 'baz' -> set()

    49     /// 'foo' -> {'bar'}

    50     /// 'foo' -> {'bar'}

    50     /// // Ideally this would be `Recursive`, but since the prefix nature of

    51     /// // Ideally this would be `Recursive`, but since the prefix nature of