{"ast_node_type":"variable","tokens":[{"end":55,"kind":"keyword","start":0,"text":"let"}]}
    let token = ctx.find_token_syntax_at_offset(CHAR)?;
pub(crate) fn replace_char_with_string(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<()> {
    let target = token.text_range();