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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def loadItems(self, excludeRead=False, loadLimit=20, since=None, until=None):
 """ Load items and call itemsLoadedDone to transform data in objects """

        self.clearItems()
        self.loadtLoadOk    = False
        self.lastLoadLength = 0
        self._itemsLoadedDone(self._getContent(excludeRead, None, loadLimit, since, until))