syntax_data: {"ast_node_type":"function","tokens":[{"end":61,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn expr_ty(&self, expr: &hir::Expr<'_>) -> Ty<'tcx> {
context_before:     /// instead of `fn(ty) -> T with T = isize`.
context_after:         self.node_type(expr.hir_id)