{"ast_node_type":"variable","tokens":[{"end":86,"kind":"keyword","start":0,"text":"let"}]}
                    let kind = FnKind::Closure(binder, coroutine_kind, fn_decl, body);
                    visit_visitable!($($mut)? vis, constness, movability, capture_clause);
                    try_visit!(vis.visit_fn(kind, *span, *id));