com.unity.perception/com.unity.perception/Runtime/GroundTruth/Labelers/BoundingBoxLabeler.cs

using System;

namespace UnityEngine.Perception.GroundTruth {
    [Serializable]
    public class BoundingBoxLabeler : CameraLabeler
    {
        public string annotationId = "F9F22E05-443F-4602-A422-EBE4EA9B55CB";
        public LabelingConfiguration labelingConfiguration;
    }
}