pub trait MediaStreamTrackMethods<D>where
    D: DomTypes,{
    // Required methods
    fn Kind(&self) -> DOMString;
    fn Id(&self) -> DOMString;
    fn Clone(&self) -> Root<Dom<<D as DomTypes>::MediaStreamTrack>>;
}pub trait MediaStreamTrackMethods<D>where
    D: DomTypes,{
    // Required methods
    fn Kind(&self) -> DOMString;
    fn Id(&self) -> DOMString;
    fn Clone(&self) -> Root<Dom<<D as DomTypes>::MediaStreamTrack>>;
}