@Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + ((callbackId == null) ? 0 : callbackId.hashCode()); result = prime * result + ((manager == null) ? 0 : manager.hashCode()); result = prime * result + ((method == null) ? 0 : method.hashCode()); result = prime * result + ((perunPrincipal == null) ? 0 : perunPrincipal.hashCode()); result = prime * result + (int) (startTime ^ (startTime >>> 32)); return result; }