{"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"this.lower_fn_decl(decl,"}]}
                        this.lower_fn_decl(decl, id, *fn_sig_span, FnDeclKind::Fn, coroutine_kind)
                    let (generics, decl) = this.lower_generics(generics, id, itctx, |this| {
                    });