or <code>false</code> when the addition overflowed.</li>
<li>When deriving new CIDR: Return new instance representing the value of
this instance plus the added amount or the highest possible address if
or <code>false</code> when the addition overflowed.</li>
<li>When deriving new CIDR: Return new instance representing the value of
this instance plus the added amount or the highest possible address if