Method is_mutable

ui/src/cpu_handler.rs:72–74

(&self)

    fn as_str(&self) -> &str {
        &self.0
    }

    fn insert_text(&mut self, text: &str, char_index: egui::text::CharIndex) -> usize {
        let mut text_string = text.to_string();
        text_string.retain(|c| c.is_ascii_hexdigit());