{"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"//"}]}
            // u<length><name>[I<element-type1..element-typeN>E], where <element-type> is <subst>,
        ty::FnDef(def_id, args) | ty::Closure(def_id, args) => {
            // as vendor extended type.