code: def allocate(self, allocate_bytes: int, sleep_time_s: int = 0):
      # divide by 8 as each element in the array occupies 8 bytes
      new_list = [0] * ceil(allocate_bytes / 8)
      self.leaks.append(new_list)
  
      time.sleep(sleep_time_s / 1000)
  
imports: from math import ceil
  import sys
  import time
  import pytest
  import ray
  from ray._private import ray_constants
  import ray._private.gcs_utils
  from ray._private.test_utils import wait_for_condition, raw_metrics
  import numpy
  from ray._private.utils import get_system_memory
  from ray._private.utils import get_used_memory
  from ray._private.state_api_test_utils import verify_failed_task
  from ray.util.state.state_manager import StateDataSourceClient
label_desc: Use image node_id 2 for calling the Leaker obj's underlying member method code with example usage: obj.allocate(allocate_bytes, sleep_time_s) without return types