{"ast_node_type":"variable","tokens":[{"end":65,"kind":"keyword","start":0,"text":"let"}]}
    let use_tree_list = ast::UseTreeList::cast(token.parent()?)?;
fn join_single_use_tree(edit: &mut TextEditBuilder, token: &SyntaxToken) -> Option<()> {
    let (tree,) = use_tree_list.use_trees().collect_tuple()?;