{"ast_node_type":"other","tokens":[{"end":37,"kind":"keyword","start":0,"text":"PatKind::Missing"}]}
            PatKind::Missing => None,
        self.arena.alloc_from_iter(decl.inputs.iter().map(|param| match param.pat.kind {
            PatKind::Ident(_, ident, _) => Some(self.lower_ident(ident)),