@java.lang.Override
    public java.lang.String getId() {
      java.lang.Object ref = id_;
      if (ref instanceof java.lang.String) {
        return (java.lang.String) ref;
      } else {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        id_ = s;
        return s;
      }
    }
<pre>
The resource ID of the AnnotationSpec that had been identified.
</pre>

<code>string id = 1;</code>

@return The id.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/VideoObjectTrackingPredictionResult.java