public Builder mergeValue(com.google.cloud.visionai.v1.AnnotationValue value) {
      if (valueBuilder_ == null) {
        if (((bitField0_ & 0x00000002) != 0)
            && value_ != null
            && value_ != com.google.cloud.visionai.v1.AnnotationValue.getDefaultInstance()) {
          getValueBuilder().mergeFrom(value);
        } else {
          value_ = value;
        }
      } else {
        valueBuilder_.mergeFrom(value);
      }
      if (value_ != null) {
        bitField0_ |= 0x00000002;
        onChanged();
      }
      return this;
    }
<pre>
Value of the annotation. The value must be able to convert
to the type according to the data schema.
</pre>

<code>.google.cloud.visionai.v1.AnnotationValue value = 2;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/UserSpecifiedAnnotation.java