com.unity.perception/com.unity.perception/Editor/GroundTruth/BoundingBoxLabelerEditor.cs

using UnityEngine;
using UnityEngine.Perception.GroundTruth;

namespace UnityEditor.Perception.GroundTruth
{
    [CustomEditor(typeof(BoundingBoxLabeler))]
    public class BoundingBoxLabelerEditor : Editor
    {
        public override void OnInspectorGUI()
        {
            // base.OnInspectorGUI();
            // return;
            EditorGUILayout.PropertyField(this.serializedObject.FindProperty(nameof(BoundingBoxLabeler.annotationId)));
            var serializedProperty = this.serializedObject.FindProperty(nameof(BoundingBoxLabeler.labelingConfiguration));

            if (serializedProperty.objectReferenceValue != null)
            {
                EditorGUILayout.Separator();
                var editor = Editor.CreateEditor(serializedProperty.objectReferenceValue);
                editor.OnInspectorGUI();
            }
        }
    }
}