syntax_data: {"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"CostChecker"}]}
source_snippet:         CostChecker { tcx, typing_env, callee_body, instance, penalty: 0, bonus: 0 }
context_before:     ) -> CostChecker<'b, 'tcx> {
context_after:     }