syntax_data: {"ast_node_type":"other","tokens":[{"end":92,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                     // With `feature(sized_hierarchy)`, don't print `?Sized` as an alias for
context_before:                 ty::ClauseKind::Trait(pred) => {
context_after:                     // `MetaSized`, and skip sizedness bounds to be added at the end.