code: def ensure_connect(self):
      try:
          # List the clusters to check the connectivity
          _ = self.vsphere_sdk_client.vcenter.Cluster.list()
      except Unauthenticated:
          self.vsphere_sdk_client = self.get_client()
      except Exception as e:
          raise RuntimeError(
              f"failed to ensure the connect, exception: {e}"
          )
  
imports: import logging
  import time
  import uuid
  from threading import RLock
  import com.vmware.vapi.std.errors_client
  import requests
  from com.vmware.cis.tagging_client import CategoryModel
  from com.vmware.content.library_client import Item
  from com.vmware.vapi.std.errors_client import Unauthenticated
  from com.vmware.vapi.std_client import DynamicID
  from com.vmware.vcenter.ovf_client import DiskProvisioningType, LibraryItem
  from com.vmware.vcenter.vm.hardware_client import Cpu, Memory
  from com.vmware.vcenter.vm_client import Power
  from com.vmware.vcenter_client import VM, Host, ResourcePool
  from vmware.vapi.vsphere.client import create_vsphere_client
  from ray.autoscaler._private.vsphere.utils import Constants, singleton_client
  from ray.autoscaler.tags import TAG_RAY_CLUSTER_NAME
label_desc: Use image node_id 3 for calling the VsphereSdkProvider obj's underlying member method code with example usage: obj.ensure_connect() without return types