code: def apply_memory_stress(chaos_yaml):
      chaos_config = gen_experiment_config(chaos_yaml)
      log.debug(chaos_config)
      chaos_res = CusResource(
          kind=chaos_config["kind"],
          group=constants.CHAOS_GROUP,
          version=constants.CHAOS_VERSION,
          namespace=constants.CHAOS_NAMESPACE,
      )
      chaos_res.create(chaos_config)
      log.debug("chaos injected")
  
imports: import random
  import threading
  import time
  from time import sleep
  import pytest
  import datetime
  from pymilvus import connections
  from base.collection_wrapper import ApiCollectionWrapper
  from base.utility_wrapper import ApiUtilityWrapper
  from chaos.checker import Op, CollectionCreateChecker, InsertFlushChecker, IndexCreateChecker, SearchChecker, QueryChecker
  from common.cus_resource_opts import CustomResourceOperations
  from common import common_func
  from common import common_type
  from chaos import chaos_commons
  from chaos.chaos_commons import gen_experiment_config, get_chaos_yamls, start_monitor_threads
  from common.common_type import CaseLabel, CheckTasks
  from chaos import constants
  from utils.util_log import test_log
  from utils.util_k8s import get_querynode_id_pod_pairs
label_desc: Use image node_id 1 for calling a global function with example usage: apply_memory_stress(chaos_yaml) without return types