pub(crate) trait AbstractRangeMethods<D>where
    D: DomTypes,{
    // Required methods
    fn StartContainer(&self) -> Root<Dom<<D as DomTypes>::Node>>;
    fn StartOffset(&self) -> u32;
    fn EndContainer(&self) -> Root<Dom<<D as DomTypes>::Node>>;
    fn EndOffset(&self) -> u32;
    fn Collapsed(&self) -> bool;
}