/span><span class="identifier">S</span><span class="special">)</span></code> is not
        entirely contained in <code class="computeroutput"><span class="identifier">R</span><span class="special">(</span><span class="identifier">T</span><span class="special">)</span></code> and
        therefore there is some portion of the source range which falls outside the
        target range. In other words, if a conversion direction <code class="computeroutput"><span class="identifier">S</span><span class="special"