syntax_data: {"ast_node_type":"function","tokens":[{"end":49,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn typing_env(&self) -> ty::TypingEnv<'tcx> {
context_before: impl<'a, 'tcx> Builder<'a, 'tcx> {
context_after:         self.infcx.typing_env(self.param_env)