n class="k">return</span><span class="w"> </span><span class="kc">null</span><span class="p">;</span>
<span class="w">	</span><span class="p">}</span>
<span class="w">	</span><span class="kt">void</span><span class="w"> </span><span class="nf">push</span><span class="p">(</span><span class="n">Object</span><span class="w"> </span><span class="n">item</span><span class="p">)</span><span class="w"> </span><span class="p">{</span><span class="w"> </span>
<span class="w">		</span><span class="n">Node</span><spa