{"ast_node_type":"other","tokens":[{"end":32,"kind":"keyword","start":0,"text":"if"}]}
        if maybe_lt == token::Lt
    pub(crate) fn maybe_err_dotdotlt_syntax(&self, maybe_lt: Token, mut err: Diag<'a>) -> Diag<'a> {
            && (self.expected_token_types.contains(TokenType::Gt)