syntax_data: {"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // traits, so `MetaSized` will always be WF if `Sized` is WF and vice-versa. Determining
context_before:         // PERF: `Sized`'s predicates include `MetaSized`, but both are compiler implemented marker
context_after:         // the nominal obligations of `Sized` would in-effect just elaborate `MetaSized` and make