{"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"ParamKind::Type"}]}
            ParamKind::Type => fallback().cast(Interner),
        let filler = self.param_kinds[self.vec.len()..].iter().map(|x| match x {
            ParamKind::Const(ty) => unknown_const_as_generic(ty.clone()),