Function get_css_from_string

pub fn get_css_from_string<'a>(
    text: &'a String,
    previous_css_rules: Option<&mut HashSet<String>>,
    previous_css_mq_rules: Option<&mut HashMap<MediaQuery, HashSet<String>>>,
    layout_style_config: &LayoutStyleConfig,
) -> String

This function can take css_set and css_mq_rules if you already have process a string before and you want to avoid to get duplicate values this way the new css will contains the previous css plus new rules from the new string