pub trait DOMCSSValueExt: 'static {
fn css_text(&self) -> Option<GString>;
fn css_value_type(&self) -> c_ushort;
fn set_css_text(&self, value: &str) -> Result<(), Error>;
fn connect_css_text_notify<F: Fn(&Self) + 'static>(
&self,
f: F
) -> SignalHandlerId;
fn connect_css_value_type_notify<F: Fn(&Self) + 'static>(
&self,
f: F
) -> SignalHandlerId;
}