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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 terminate_instance(self, instance_id, decrement_capacity=True):
 """ Terminates the specified instance. The desired group size can also be adjusted, if desired. :type instance_id: str :param instance_id: The ID of the instance to be terminated. :type decrement_capability: bool :param decrement_capacity: Whether to decrement the size of the autoscaling group or not. """

        params = {'InstanceId': instance_id}
        if decrement_capacity:
            params['ShouldDecrementDesiredCapacity'] = 'true'
        else:
            params['ShouldDecrementDesiredCapacity'] = 'false'
        return self.get_object('TerminateInstanceInAutoScalingGroup', params,
                               Activity)