public Builder putAnnotations(java.lang.String key, java.lang.String value) {
      if (key == null) {
        throw new NullPointerException("map key");
      }
      if (value == null) {
        throw new NullPointerException("map value");
      }
      internalGetMutableAnnotations().getMutableMap().put(key, value);
      bitField0_ |= 0x00000010;
      return this;
    }
<pre>
Annotations to allow clients to store small amounts of arbitrary data.
</pre>

<code>map&lt;string, string&gt; annotations = 5;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/Series.java