syntax_data: {"ast_node_type":"function","tokens":[{"end":35,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn tcx(&self) -> TyCtxt<'tcx> {
context_before: impl<'tcx> MutVisitor<'tcx> for FixReturnPendingVisitor<'tcx> {
context_after:         self.tcx