nsactions need to be compared that the two streams are in different forms.&nbsp; That is, the type of the <i>BEFORE</i> transaction stream is different than the type of the <i>AFTER</i> transaction stream.</p><p>The uvm_algorithmic_comparator&rsquo;s <i>TRANSFORMER</i> type parameter specifies the class responsible for converting transactions of type <i>BEFORE</i> into those of type <i>AFTER</i>.&nbsp; This transformer class must provide a transform() method with the following prototype:</p><blockquote><pre