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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 getRejectionReasonsItems(self):
 """Return the list of predefined rejection reasons """

        reasons = self.getRejectionReasons()
        if not reasons:
            return []
        reasons = reasons[0]
        keys = filter(lambda key: key != "checkbox", reasons.keys())
        return map(lambda key: reasons[key], sorted(keys)) or []