public Builder mergeFrom(com.google.cloud.videointelligence.v1beta2.FaceFrame other) {
      if (other == com.google.cloud.videointelligence.v1beta2.FaceFrame.getDefaultInstance())
        return this;
      if (normalizedBoundingBoxesBuilder_ == null) {
        if (!other.normalizedBoundingBoxes_.isEmpty()) {
          if (normalizedBoundingBoxes_.isEmpty()) {
            normalizedBoundingBoxes_ = other.normalizedBoundingBoxes_;
            bitField0_ = (bitField0_ & ~0x00000001);
          } else {
            ensureNormalizedBoundingBoxesIsMutable();
            normalizedBoundingBoxes_.addAll(other.normalizedBoundingBoxes_);
          }
          onChanged();
        }
      } else {
        if (!other.normalizedBoundingBoxes_.isEmpty()) {
          if (normalizedBoundingBoxesBuilder_.isEmpty()) {
            normalizedBoundingBoxesBuilder_.dispose();
            normalizedBoundingBoxesBuilder_ = null;
            normalizedBoundingBoxes_ = other.normalizedBoundingBoxes_;
            bitField0_ = (bitField0_ & ~0x00000001);
            normalizedBoundingBoxesBuilder_ =
                com.google.protobuf.GeneratedMessageV3.alwaysUseFieldBuilders
                    ? getNormalizedBoundingBoxesFieldBuilder()
                    : null;
          } else {
            normalizedBoundingBoxesBuilder_.addAllMessages(other.normalizedBoundingBoxes_);
          }
        }
      }
      if (other.hasTimeOffset()) {
        mergeTimeOffset(other.getTimeOffset());
      }
      this.mergeUnknownFields(other.getUnknownFields());
      onChanged();
      return this;
    }
<pre>
Video frame level annotation results for face detection.
</pre>

Protobuf type {@code google.cloud.videointelligence.v1beta2.FaceFrame}
java-video-intelligence/proto-google-cloud-video-intelligence-v1beta2/src/main/java/com/google/cloud/videointelligence/v1beta2/FaceFrame.java