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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 mutate(self):
        '''
        Mutate the field

        :rtype: boolean
        :return: True if field the mutated
        '''
        self._initialize()
        if self._exhausted():
            return False
        self._current_index += 1
        self._mutate()
        return True