 result and the same definition class will return the cached result.
            </p><p>
            If the command line input does not contain the indicated definition class (as self or as a parent), this method will return <span class="keyword"><span id="LST1B14872C_1" data-languageSpecificText="cpp=nullptr|vb=Nothing|nu=null"></span></span>
            unless <span class="parameter">returnEmpty</span> is set to <span class="keyword"><span id="LST1B14872C_2" data-languageSpecificText="vb=True|nu=true"></s