public Builder setAnnotation(com.google.cloud.visionai.v1.StreamAnnotation value) {
          if (annotationBuilder_ == null) {
            if (value == null) {
              throw new NullPointerException();
            }
            annotation_ = value;
          } else {
            annotationBuilder_.setMessage(value);
          }
          bitField0_ |= 0x00000001;
          onChanged();
          return this;
        }
<pre>
Line annotation from the user.
</pre>

<code>.google.cloud.visionai.v1.StreamAnnotation annotation = 1;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/OccupancyCountingPredictionResult.java