public static void Open(Inventory inventory)
    {
        InventoryEditorWindow window = GetWindow <InventoryEditorWindow>("Inventory Tester");

        window.minSize          = new Vector2(800, 300);
        window.serializedObject = new SerializedObject(inventory);
        Inventory = inventory;
    }
 public override void OnInspectorGUI()
 {
     base.OnInspectorGUI();
     if (GUILayout.Button("Open Inventory Tester"))
     {
         InventoryEditorWindow.Open(inventory);
     }
 }