@Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        final WhoIsRequest other = (WhoIsRequest) obj;
        if (deviceInstanceRangeHighLimit == null) {
            if (other.deviceInstanceRangeHighLimit != null)
                return false;
        }
        else if (!deviceInstanceRangeHighLimit.equals(other.deviceInstanceRangeHighLimit))
            return false;
        if (deviceInstanceRangeLowLimit == null) {
            if (other.deviceInstanceRangeLowLimit != null)
                return false;
        }
        else if (!deviceInstanceRangeLowLimit.equals(other.deviceInstanceRangeLowLimit))
            return false;
        return true;
    }