{"ast_node_type":"impl","tokens":[{"end":85,"kind":"keyword","start":0,"text":"//"}]}
        // impl {Meta,}Sized for u*, i*, bool, f*, FnDef, FnPtr, *(const/mut) T, char
    match ty.kind() {
        // impl {Meta,}Sized for &mut? T, [T; N], dyn* Trait, !, Coroutine, CoroutineWitness