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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 get(self, sid):
 """ Constructs a VariableContext :param sid: The sid :returns: twilio.rest.serverless.v1.service.environment.variable.VariableContext :rtype: twilio.rest.serverless.v1.service.environment.variable.VariableContext """

        return VariableContext(
            self._version,
            service_sid=self._solution['service_sid'],
            environment_sid=self._solution['environment_sid'],
            sid=sid,
        )