{"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"///"}]}
    /// A function pointer type (e.g., `fn(usize) -> bool`).
    PinnedRef(#[visitable(extra = LifetimeCtxt::Ref)] Option<Lifetime>, MutTy),
    FnPtr(P<FnPtrTy>),