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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 dynacRepresentation(self):
 """ Return the Dynac representation of this cavity instance. """

        return ['CAVMC', [
            [self.cavID.val],
            [self.xesln.val, self.phase.val, self.fieldReduction.val, self.isec.val, 1],
            ]]