Merge pull request #43 from unity/additonal_scenario_configs

Make randomizer state field optional for json config

com.unity.perception/Runtime/Randomization/Randomizers/Randomizer.cs

         /// <summary>
         /// Some Randomizers should not be disabled by the user as they are critical to the project. E.g. We might want to mark this as false for a foreground objects placement randomizer in some projects
         /// </summary>
+#if !SCENARIO_CONFIG_POWER_USER
+        [field: HideInInspector]
+#endif
         [field: SerializeField]
         public bool enabledStateCanBeSwitchedByUser { get; set; } = true;
 

com.unity.perception/Runtime/Randomization/Scenarios/Serialization/ScenarioSerializer.cs

         static Group SerializeRandomizer(Randomizer randomizer)
         {
             var randomizerData = new Group();
-            randomizerData.state.enabled = randomizer.enabled;
-            randomizerData.state.canBeSwitchedByUser = randomizer.enabledStateCanBeSwitchedByUser;
+            randomizerData.state = new RandomizerStateData
+            {
+                enabled = randomizer.enabled,
+                canBeSwitchedByUser = randomizer.enabledStateCanBeSwitchedByUser
+            };
 
             var fields = randomizer.GetType().GetFields();
             foreach (var field in fields)
 
         static void DeserializeRandomizer(Randomizer randomizer, Group randomizerData)
         {
-            randomizer.enabled = randomizerData.state.enabled;
-            randomizer.enabledStateCanBeSwitchedByUser = randomizerData.state.canBeSwitchedByUser;
+            if (randomizerData.state != null)
+            {
+                randomizer.enabled = randomizerData.state.enabled;
+                randomizer.enabledStateCanBeSwitchedByUser = randomizerData.state.canBeSwitchedByUser;
+            }
 
             foreach (var pair in randomizerData.items)
             {

com.unity.perception/Runtime/Randomization/Scenarios/Serialization/SerializationStructures.cs

     class Group
     {
         public StandardMetadata metadata = new StandardMetadata();
-        public RandomizerStateData state = new RandomizerStateData();
+        public RandomizerStateData state = null;
         [JsonConverter(typeof(GroupItemsConverter))]
         public Dictionary<string, IGroupItem> items = new Dictionary<string, IGroupItem>();
     }