add support for blocks with submodels

src/main/kotlin/mods/betterfoliage/loader/Refs.kt

@@ -64,6 +64,8 @@ object Refs {
     val model_WPW = FieldRef(WeightedPartWrapper, "model", IModel)
     val WeightedRandomModel = ClassRef("net.minecraftforge.client.model.ModelLoader\$WeightedRandomModel")
     val models_WRM = FieldRef(WeightedRandomModel, "models", List)
+    val MultiModel = ClassRef("net.minecraftforge.client.model.MultiModel")
+    val base_MM = FieldRef(MultiModel, "base", IModel)
 
     // Better Foliage
     val BetterFoliageHooks = ClassRef("mods.betterfoliage.client.Hooks")

src/main/kotlin/mods/octarinecore/client/resource/ModelDataInspector.kt

@@ -110,6 +110,9 @@ val IModel.modelBlockAndLoc: Pair<ModelBlock, ResourceLocation>? get() {
             it.modelBlockAndLoc.let { if (it != null) return it }
         }
     }
+    else if (Refs.MultiModel.isInstance(this)) Refs.base_MM.get(this)?.let {
+        return (it as IModel).modelBlockAndLoc
+    }
     return null
 }