docs: def do_startInstance(self,args):
          """Start specified instance"""
          parser = CommandArgumentParser("startInstance")
          parser.add_argument(dest='instance',help='instance index or name');
          args = vars(parser.parse_args(args))
  
          instanceId = args['instance']
          force = args['force']
          try:
              index = int(instanceId)
              instances = self.scalingGroupDescription['AutoScalingGroups'][0]['Instances']
              instanceId = instances[index]
          except ValueError:
              pass
  
          client = AwsConnectionFactory.getEc2Client()
          client.start_instances(InstanceIds=[instanceId['InstanceId']])