syntax_data: {"ast_node_type":"function","tokens":[{"end":72,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn new(tcx: TyCtxt<'tcx>, typing_env: ty::TypingEnv<'tcx>) -> Self {
context_before: impl<'tcx> TryNormalizeAfterErasingRegionsFolder<'tcx> {
context_after:         TryNormalizeAfterErasingRegionsFolder { tcx, typing_env }