<span class="hljs-class"><span class="hljs-keyword">message</span> <span class="hljs-title">Container</span> </span>{
  <span class="hljs-class"><span class="hljs-keyword">message</span> <span class="hljs-title">Message</span> </span>{
    <span class="hljs-keyword">required</span> <span class="hljs-built_in">int64</span> id = <span class="hljs-number">1</span>;
  }
  <span class="hljs-keyword">repeated</span> Message messages = <span class="hljs-number">1</span>;
  <span class="hljs-keyword">optional</span> <span class="hljs-built_in">int32</span> number = <span class="hljs-number">2</span>;
}
