code: def test_raylet_failed(ray_start_cluster):
      cluster = ray_start_cluster
      # Kill all raylets on worker nodes.
      _test_component_failed(cluster, ray_constants.PROCESS_TYPE_RAYLET)
  
file_path: ray/python/ray/tests/test_component_failures_2.py
imports: import signal
  import sys
  import time
  import pytest
  import ray
  import ray._private.ray_constants
  from ray._private.test_utils import get_other_nodes, wait_for_condition
  from ray.cluster_utils import Cluster, cluster_not_supported
label_desc: Use image node_id 4 for calling a global function with example usage: test_raylet_failed(ray_start_cluster) without return types