for (HiddenSlot hiddenSlot : this.hiddenSlots.values()) {
for (HiddenSlot hiddenSlot : this.hiddenSlots) {
    private void updateHiddenSlots(MetaObject metaObject) {        for (HiddenSlot hiddenSlot : this.hiddenSlots.values()) {            for (MetaSlot slot : metaObject.getHiddenSlots()) {                if (slot.getName().equals(hiddenSlot.getName())) {                    hiddenSlot.setKey(slot.getKey());                }            }        }    }