def add_post_change_hook(self, which, cmd):
        self.hooks[which].append(cmd)
Get a list of hosts for non-deleted instances in the group
dataset/ETHPy150Open boakley/robotframework-workbench/rwb/widgets/text_mixins.py/TextCallbackMixin.add_post_change_hook--crossover with--dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/objects/instance_group.py/InstanceGroup.get_hosts