visualization/visualization-model/src/main/java/se/jguru/nazgul/tools/visualization/model/diagram/NodeID.java
@Override
    public int compareTo(final NodeID that) {

        // Fail fast
        if (that == this) {
            return 0;
        } else if (null == that) {
            return -1;
        }

        // Delegate to internal state
        return this.getId().compareTo(that.getId());
    }
@Override
    public int compareTo(final NodeID that) {

        // Fail fast
        if (that == this) {
            return 0;
        } else if (null == that) {
            return -1;
        }

        // Delegate to internal state
        return this.getId().compareTo(that.getId());
    }
Compares the supplied NodeID to this one.

@param that A NodeID to compare to this one.
@return THe difference in