syntax_data: {"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:         if self.can_use_global_caches(param_env, trait_pred) {
context_before:         let tcx = infcx.tcx;
context_after:             let key = (infcx.typing_env(param_env), trait_pred);