{"ast_node_type":"variable","tokens":[{"end":46,"kind":"keyword","start":0,"text":"let"}]}
    let params = if ty_args.peek().is_some() {
    let mut ty_args = ty.generic_parameters(sema.db, display_target).peekable();
        format!("<{}>", ty_args.format_with(",", |ty, cb| cb(&ty)))