registerItem
fun registerItem(name: String, vararg behaviors: ItemBehaviorHolder, localizedName: String? = null, isHidden: Boolean = false): NovaItem
fun registerItem(block: NovaBlock, vararg behaviors: ItemBehaviorHolder, localizedName: String? = null, isHidden: Boolean = false): NovaItem
fun registerItem(block: NovaBlock, name: String, vararg behaviors: ItemBehaviorHolder, localizedName: String? = null, isHidden: Boolean = false): NovaItem