declare namespace org {
    namespace eclipse {
        namespace jetty {
            namespace util {
                class FutureCallback implements java.util.concurrent.Future<java.lang.Void> , org.eclipse.jetty.util.Callback {
                    public constructor()
                    public constructor(arg0: boolean)
                    public constructor(arg0: java.lang.Throwable)
                    public succeeded(): void
                    public failed(arg0: java.lang.Throwable): void
                    public cancel(arg0: boolean): boolean
                    public isCancelled(): boolean
                    public isDone(): boolean
                    public get(): java.lang.Void
                    public get(arg0: long, arg1: java.util.concurrent.TimeUnit): java.lang.Void
                    public static rethrow(arg0: java.util.concurrent.ExecutionException): void
                    public toString(): string
                    public get(arg0: long, arg1: java.util.concurrent.TimeUnit): java.lang.Object
                    public get(): java.lang.Object
                    public static class: java.lang.Class<any>
                }
            }
        }
    }
}