syntax_data: {"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // regions here. See the comment there for more details.
context_before:         // `assemble_candidates_for_unsizing` should ensure there are no late-bound
context_after:         let predicate = obligation.predicate.no_bound_vars().unwrap();