after the dot. For example, the <code class="docutils literal notranslate"><span class="pre">kalmanFilter</span></code> class has a data field named <code class="docutils literal notranslate"><span class="pre">label</span></code>, which stores an optional label for a <code class="docutils literal notranslate"><span class="pre">kalmanFilter</span></code> object. Continuing the previous examples, you can return the label for object 1 using:</p>
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