Function class_namespaced 

pub fn class_namespaced(
    namespace: impl ToString,
    class_names: impl ToString,
) -> String

Prepend namespace to this class name. This is used in assigning the class name in an element.

#Examples:

use jss::class_namespaced;

assert_eq!("frame__text-anim", class_namespaced("frame", "text-anim"));