{"ast_node_type":"other","tokens":[{"end":90,"kind":"keyword","start":0,"text":"//"}]}
            // other explicit ones) - this can happen for trait aliases as well as bounds.
            // `?Sized` is equivalent to `MetaSized` (but only add the bound if there aren't any
            add_trait_bound(tcx, bounds, self_ty, meta_sized_did, span);