<p></p>
        Create a copy of a set <tt>S</tt> and return a new object <tt>Snew</tt> with same properties as the original set.
        Changing one object does not affect the second one because the objects are not connected by reference. <br><br>        
        Note that this method is different versus the equality assignment <tt>Snew = S</tt> which points to the same object.
        See the example for explanation.
    <h2>Input Arguments</h2>
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