ss="kd">private</span> <span class="kd">func</span> <span class="nf">sign</span><span class="p">()</span> <span class="o">-&gt;</span> <span class="kt">InequalitySign</span><span class="p">?</span></code></pre>

                        </div>
                      </div>
                      <div>
                        <h4>Return Value</h4>
                        <p><code>InequalitySign</code> or nil if sign cannot be found.</p>

                      </div>
                    </section>
              