@Override
    public boolean equals(Object other) {
        if (other == this) return true;
        if ( ! (other instanceof NetworkPorts)) return false;
        return ((NetworkPorts)other).allocations.equals(this.allocations);
    }
Returns a read only collection of the port allocations of this
config-provisioning/src/main/java/com/yahoo/config/provision/NetworkPorts.java