n class="special">();</span>
    <span class="keyword">void</span> <span class="identifier">enable_user_defined</span><span class="special">();</span>
    <span class="keyword">void</span> <span class="identifier">disable_signatures</span><span class="special">();</span>
    <span class="keyword">void</span> <span class="identifier">enable_signatures</span><span class="special">();</span>
    <span class="keyword">void</span> <span class="identifier">disable_py_signatures</span><span class="special">();</sp