{"ast_node_type":"variable","tokens":[{"end":65,"kind":"keyword","start":0,"text":"let"}]}
    let closure = ctx.find_node_at_offset::<ast::ClosureExpr>()?;
pub(crate) fn convert_closure_to_fn(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<()> {
    if ctx.find_node_at_offset::<ast::Expr>() != Some(ast::Expr::ClosureExpr(closure.clone())) {