{"ast_node_type":"other","tokens":[{"end":39,"kind":"keyword","start":0,"text":"if"}]}
        if self.token == token::Colon {
    pub(super) fn suggest_add_missing_let_for_stmt(&mut self, err: &mut Diag<'a>) {
            let prev_span = self.prev_token.span.shrink_to_lo();