 
 		clone.storage = utils.cloneDeep @storage
 		clone.array = null
+		clone.usedUnits = []
 
 		clone.updateItem = @updateItem.bind clone
 		clone.insertItem = @insertItem.bind clone

		unit = new File.Unit self, name, @bodyNode
		@unit = unit.id
		@bodyNode.parent = undefined

		@usedUnits = []

	unit: ''
	storage: null

	clearData: ->
		expect(@data).toBe.object()

		while length = @usedUnits.length
			@popItem length - 1

		@
