syntax_data: {"ast_node_type":"other","tokens":[{"end":39,"kind":"keyword","start":0,"text":"self.node_type_opt(expr.hir_id)"}]}
source_snippet:         self.node_type_opt(expr.hir_id)
context_before:     pub fn expr_ty_opt(&self, expr: &hir::Expr<'_>) -> Option<Ty<'tcx>> {
context_after:     }