perty</span><span class="token punctuation">(</span><span class="token string">'age'</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// Happy birthday!</span>
<span aria-hidden="true" class="line-numbers-rows"><a href="#C2_L1" id=C2_L1></a></span></code></pre>
<p>You can tell if a record has outstanding changes that have not yet been
saved by checking its <code>isDirty</code> property. You can also see what parts of
the record were changed a