x/Output/operator_equals.html">operator ==</a> implementation only considers objects
equal if they are identical (see <code>identityHashCode</code>).</p>
<p>If <a href="bitbox/Output/operator_equals.html">operator ==</a> is overridden to use the object state instead,
the hash code must also be changed to represent that state.</p>
<p>Hash codes must be the same for objects that are equal to each other
according to <a href="bitbox/Output/operator_equals.html">operator ==</a>.
The hash code of an object should