@java.lang.Override
  public boolean containsAnnotations(java.lang.String key) {
    if (key == null) {
      throw new NullPointerException("map key");
    }
    return internalGetAnnotations().getMap().containsKey(key);
  }
<pre>
Allows users to store small amounts of arbitrary data.
Both the key and the value must be 63 characters or less each.
At most 100 annotations.
</pre>

<code>map&lt;string, string&gt; annotations = 7;</code>
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/Recognizer.java