@Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        StartEndPair other = (StartEndPair) obj;
        if (dimensionOrderNumber != other.dimensionOrderNumber)
            return false;
        return true;
    }