{"ast_node_type":"variable","tokens":[{"end":52,"kind":"keyword","start":0,"text":"let"}]}
            let ident = field.ident(self.infcx.tcx);
            let field_ty = field.ty(self.infcx.tcx, args);
            if field_ty == ty && fields.iter().all(|field| field.ident.name != ident.name) {