span class="ruby-identifier">transform_values</span>(<span class="ruby-operator">&amp;</span><span class="ruby-value">:first</span>), <span class="ruby-identifier">record</span>.<span class="ruby-identifier">saved_changes</span>.<span class="ruby-identifier">transform_values</span>(<span class="ruby-operator">&amp;</span><span class="ruby-value">:last</span>)]
<span class="ruby-keyword">end</span></pre>
          </div>
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