{"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"///"}]}
    /// would be `Concatenating`. This also used in trait refs in where clauses
    /// `T: for<'a>  Foo<Bar: for<'b> Baz<'a, 'b>>`, then the `for<'b>` scope
    /// where we have two binders `for<> T: for<> Foo` (I've intentionally left