fn expect_non_empty(i: &str) -> std::result::Result<(), nom::Err<VerboseError<&str>>> {
        if i.is_empty() {
            Err(nom::Err::Error(ParseError::from_error_kind(
                i,
                ErrorKind::LengthValue,
            )))
        } else {
            Ok(())
        }
    }
Returns Error when string is Empty
packages/stylist-macros/src/literal/fstring.rs