Trait RealmBuilderFactoryProxyInterface 
Source pub trait RealmBuilderFactoryProxyInterface: Send + Sync {
    type CreateResponseFut: Future<Output = Result<RealmBuilderFactoryCreateResult, Error>> + Send;
    type CreateFromRelativeUrlResponseFut: Future<Output = Result<RealmBuilderFactoryCreateFromRelativeUrlResult, Error>> + Send;
    // Required methods
    fn create(
        &self,
        pkg_dir_handle: ClientEnd<DirectoryMarker>,
        realm_server_end: ServerEnd<RealmMarker>,
        builder_server_end: ServerEnd<BuilderMarker>,
    ) -> Self::CreateResponseFut;
    fn create_from_relative_url(
        &self,
        pkg_dir_handle: ClientEnd<DirectoryMarker>,
        relative_url: &str,
        realm_server_end: ServerEnd<RealmMarker>,
        builder_server_end: ServerEnd<BuilderMarker>,
    ) -> Self::CreateFromRelativeUrlResponseFut;
}