syntax_data: {"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"impl<'tcx>"}]}
source_snippet: impl<'tcx> PrettyPrinter<'tcx> for FmtPrinter<'_, 'tcx> {
context_after:     fn ty_infer_name(&self, id: ty::TyVid) -> Option<Symbol> {