{"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"hir::Mutability::Not"}]}
            hir::Mutability::Not => tcx.require_lang_item(LangItem::Deref, self.span),
        let trait_def_id = match self.mutbl {
            hir::Mutability::Mut => tcx.require_lang_item(LangItem::DerefMut, self.span),