'Suspends Auto Scaling processes for an Auto Scaling group.
:type as_group: string
:param as_group: The auto scaling group to suspend processes on.
:type scaling_processes: list
:param scaling_processes: Processes you want to suspend. If omitted,
all processes will be suspended.'

def suspend_processes(self, as_group, scaling_processes=None):

    params = {'AutoScalingGroupName': as_group}
    if scaling_processes:
        self.build_list_params(params, scaling_processes, 'ScalingProcesses')
    return self.get_status('SuspendProcesses', params)
