docstr: The function is used to judge whether vm is power off
docstr_tok: ["The","function","is","used","to","judge","whether","vm","is","power","off"]
code: def is_vm_power_off(self, vm_id):
      """
      The function is used to judge whether vm is power off
      """
      vm = self.get_pyvmomi_obj([vim.VirtualMachine], obj_id=vm_id)
      return (
          vm.runtime.powerState
          == vim.VirtualMachinePowerState.poweredOff
      )
  
imports: import atexit
  import logging
  import ssl
  import time
  from enum import Enum
  from pyVim.connect import Disconnect, SmartStubAdapter, VimSessionOrientedStub
  from pyVim.task import WaitForTask
  from pyVmomi import vim, vmodl
  from ray.autoscaler._private.vsphere.utils import Constants, is_ipv4, singleton_client
label_desc: Use image node_id 11 for calling the PyvmomiSdkProvider obj's underlying member method code with example usage: obj.is_vm_power_off(vm_id) and returns: unknown