Trait ServoInternalsMethods 
Source pub trait ServoInternalsMethods<D>{
    // Required methods
    fn ReportMemory(
        &self,
        _comp: InRealm<'_>,
        _can_gc: CanGc,
    ) -> Rc<<D as DomTypes>::Promise>;
    fn GetStringPreference(&self, name: USVString) -> Result<USVString, Error>;
    fn GetIntPreference(&self, name: USVString) -> Result<i64, Error>;
    fn GetBoolPreference(&self, name: USVString) -> Result<bool, Error>;
    fn SetStringPreference(&self, name: USVString, value: USVString);
    fn SetIntPreference(&self, name: USVString, value: i64);
    fn SetBoolPreference(&self, name: USVString, value: bool);
}