Function string_template_plus::transformers::string_format_case

pub fn string_format_case(
    val: &str,
    args: Vec<&str>
) -> Result<String, TransformerError>

Format the string. Supports up=> UPCASE, down=> downcase, proper => first character UPCASE all others downcase, title => title case according to titlecase::titlecase. e.g. {var:case(up)}.