Add check_reference helper

Prefabs/combinable_item.gd

@@ -14,14 +14,11 @@ var _food_item: FoodItem
 func _ready() -> void:
 	SweetLogger.debug("{0} ready", [_pickable.name])
 	_food_item = get_parent().get_node_or_null("FoodItem") as FoodItem
-	if not _food_item:
-		SweetLogger.warning("{0} missing FoodItem reference, must be a sibling of a FoodItem", [get_parent().name])
 
 	if not _pickable:
 		SweetLogger.error("{0} must be a grandchild of an XRToolsPickable", [get_parent().name])
 		return
-	if not _food_item:
-		SweetLogger.warning("{0} requires a FoodItem sibling", [_pickable.name])
+	if not Helper.check_reference(get_parent(), _food_item, FoodItem):
 		return
 	if not enabled:
 		return

Prefabs/cookable_item.gd

@@ -5,5 +5,4 @@ extends Node
 @export var turns_into: PackedScene
 
 func _ready() -> void:
-	if not turns_into:
-		SweetLogger.warning("{0} missing turns_into reference", [name])
+	Helper.check_reference(self, turns_into, PackedScene)

Prefabs/kitchen_instantiator.gd

@@ -5,9 +5,7 @@ extends Node3D
 
 
 func _ready() -> void:
-
-	if not kitchen_scene:
-		SweetLogger.warning("{0} missing kitchen_scene reference", [name])
+	Helper.check_reference(self, kitchen_scene, PackedScene)
 
 	SweetLogger.debug("->[]")