{"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"///"}]}
    /// The resulting type is either `Pin<&'a T>` or `Pin<&'a mut T>`
    /// A pinned borrow, `&pin const $expr` or `&pin mut $expr`.
    /// where `T = typeof($expr)` and `'a` is some lifetime.