Macro slugify 

macro_rules! slugify {
    ($text:expr) => { ... };
    ($text:expr, randomness=$bool:expr) => { ... };
    ($text:expr, randomness=$bool:expr,randomness_length=$usize:expr) => { ... };
    ($text:expr, stop_words=$stopwords:expr) => { ... };
    ($text:expr, stop_words=$stopwords:expr,randomness=$bool:expr) => { ... };
    ($text:expr, stop_words=$stopwords:expr,randomness=$bool:expr,randomness_length=$usize:expr) => { ... };
    ($text:expr, separator=$sep:expr) => { ... };
    ($text:expr, separator=$sep:expr,randomness=$bool:expr) => { ... };
    ($text:expr, separator=$sep:expr,randomness=$bool:expr,randomness_length=$usize:expr) => { ... };
    ($text:expr, max_length=$len:expr) => { ... };
    ($text:expr, max_length=$len:expr,randomness=$bool:expr) => { ... };
    ($text:expr, max_length=$len:expr,randomness=$bool:expr,randomness_length=$usize:expr) => { ... };
    ($text:expr, stop_words=$stopwords:expr, separator=$sep:expr) => { ... };
    ($text:expr, stop_words=$stopwords:expr, separator=$sep:expr,randomness=$bool:expr) => { ... };
    ($text:expr, stop_words=$stopwords:expr, separator=$sep:expr,randomness=$bool:expr,randomness_length=$usize:expr) => { ... };
    ($text:expr, stop_words=$stopwords:expr, max_length=$len:expr) => { ... };
    ($text:expr, stop_words=$stopwords:expr, max_length=$len:expr,randomness=$bool:expr) => { ... };
    ($text:expr, stop_words=$stopwords:expr, max_length=$len:expr,randomness=$bool:expr,randomness_length=$usize:expr) => { ... };
    ($text:expr, separator=$sep:expr, max_length=$len:expr) => { ... };
    ($text:expr, separator=$sep:expr, max_length=$len:expr,randomness=$bool:expr) => { ... };
    ($text:expr, separator=$sep:expr, max_length=$len:expr,randomness=$bool:expr,randomness_length=$usize:expr) => { ... };
    ($text:expr, stop_words=$stopwords:expr, separator=$sep:expr, max_length=$len:expr) => { ... };
    ($text:expr, stop_words=$stopwords:expr, separator=$sep:expr, max_length=$len:expr,randomness=$bool:expr) => { ... };
    ($text:expr, stop_words=$stopwords:expr, separator=$sep:expr, max_length=$len:expr,randomness=$bool:expr,randomness_length=$usize:expr) => { ... };
}