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<td><p><span class="term">Effects:</span></p></td>
<td>Moves content of <code class="computeroutput">rhs</code> into
            current instance, discarding previous content, so that the
            new content is equivalent in both type and value to the
            content of <code class="computeroutput">rhs</code> before move, or empty if
            <code class="computeroutput">rhs.<a class="link" href="any.html#id-1_3_5_5_2_1_2_13_1-bb">empty</a>()<