pub trait FlatlandDisplayProxyInterface: Send + Sync {
// Required methods
fn set_content(
&self,
token: ViewportCreationToken,
child_view_watcher: ServerEnd<ChildViewWatcherMarker>,
) -> Result<(), Error>;
fn set_device_pixel_ratio(
&self,
device_pixel_ratio: &VecF,
) -> Result<(), Error>;
}