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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 drop_right(self, n):
 """ Drops the last n elements of the sequence. [1, 2, 3] :param n: number of elements to drop :return: sequence with last n elements dropped """

        return self._transform(transformations.CACHE_T, transformations.drop_right_t(n))