class VariableEntry implements Serializable, Comparable<VariableEntry> {

    @Override
    public boolean equals(Object arg) {
        if (arg == null || !(arg instanceof VariableEntry)) {
            return false;
        }
        VariableEntry o = (VariableEntry) arg;
        return new EqualsBuilder().append(key, o.key).append(value, o.value).isEquals();
    }

    public  VariableEntry();
    public  VariableEntry(String key, String value);

}