Time</span><span class="p">()</span> <span class="kt">int64</span> <span class="p">{</span>
    <span class="k">return</span> <span class="nx">i</span><span class="p">.</span><span class="nx">Timestamp</span>
<span class="p">}</span>

<span class="kd">func</span> <span class="p">(</span><span class="nx">i</span> <span class="nx">Item</span><span class="p">)</span> <span class="nx">Touch</span><span class="p">()</span> <span class="kt">int64</span> <span class="p">{</span>
    <span class="k">return</span> <