{"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"///"}]}
    /// user has `<T as Trait<'a>>::Item: 'b` in the environment, then
    /// Trait<'0>>::Item` where `'0` is a region variable, and the
    /// the clause from the environment only applies if `'0 = 'a`,