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