syntax_data: {"ast_node_type":"variable","tokens":[{"end":65,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:             let mut result = this.evaluate_predicate_recursively(
context_before:                 this.infcx.resolve_vars_if_possible((obligation.predicate, obligation.param_env));
context_after:                 TraitObligationStackList::empty(&ProvisionalEvaluationCache::default()),