ass="emphasis"><em>Special and Optional</em></span> <span class="bold"><strong>Stateless
                  Policy</strong></span> which can be used to override the internal range
                  checking logic.
                </p>
                <p>
                  If given, supplies alternative code for the <code class="computeroutput"><span class="identifier">out_of_range</span><span class="special">()</span></code> and <code class="computeroutput"><span class="identifier">validate_range</span><span