amp</dfn> MUST return the value it was initialized to.</p>
        <p><dfn>stackId</dfn> MUST return the value it was initialized to.</p>
      </section>
      <section data-dfn-for="ProfilerStack" data-link-for="ProfilerStack">
        <h2>The <dfn>ProfilerStack</dfn> Dictionary</h2>
        <pre class="idl">
        dictionary ProfilerStack {
          unsigned long long parentId;
          required unsigned long long frameId;
        };
        </pre>
        <p><dfn>parentId</dfn> MUST return the value