syntax_data: {"ast_node_type":"other","tokens":[{"end":32,"kind":"keyword","start":0,"text":"self.as_predicate(),"}]}
source_snippet:             self.as_predicate(),
context_before:         tcx.reuse_or_mk_predicate(
context_after:             ty::Binder::bind_with_vars(PredicateKind::Clause(new), bound_vars),