declare namespace org {
    namespace eclipse {
        namespace jetty {
            namespace util {
                abstract class CompletableCallback implements org.eclipse.jetty.util.Callback {
                    public constructor()
                    public succeeded(): void
                    public failed(arg0: java.lang.Throwable): void
                    public abstract resume(): void
                    public abstract abort(arg0: java.lang.Throwable): void
                    public tryComplete(): boolean
                    public static class: java.lang.Class<any>
                }
            }
        }
    }
}