punctuation">)</span><span class="token punctuation">,</span>
      <span class="token string-property property">'ANOTHER_HEADER'</span><span class="token operator">:</span> <span class="token string">'Some header value'</span>
    <span class="token punctuation">}</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">volatile</span><span class="token punctuation">(