docstr: This function is used to create RAY_NODE category.
  This category is associated with VMs and supports
  multiple tags e.g. "Ray-Head-Node, Ray-Worker-Node-1 etc."
docstr_tok: ["This","function","is","used","to","create","RAY_NODE","category",".","This","category","is","associated","with","VMs","and","supports","multiple","tags","e.g",".","``","Ray-Head-Node",",","Ray-Worker-Node-1","etc",".","''"]
code: def create_category(self):
      """
      This function is used to create RAY_NODE category.
      This category is associated with VMs and supports
      multiple tags e.g. "Ray-Head-Node, Ray-Worker-Node-1 etc."
      """
      logger.info(f"Creating {Constants.NODE_CATEGORY} category")
      category_spec = (
          self.vsphere_sdk_client.tagging.Category.CreateSpec(
              name=Constants.NODE_CATEGORY,
              description="Identifies Ray head node and worker nodes",
              cardinality=CategoryModel.Cardinality.MULTIPLE,
              associable_types=set(),
          )
      )
      category_id = None
  
      try:
          category_id = self.vsphere_sdk_client.tagging.Category.create(
              category_spec
          )
      except ErrorClients.Unauthorized as e:
          logger.critical(
              f"Unauthorized to create the category. Exception: {e}"
          )
          raise e
      except Exception as e:
          logger.critical(e)
          raise e
  
      logger.info(f"Category {category_id} created")
  
      return category_id
  
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 16 for calling the VsphereSdkProvider obj's underlying member method code with example usage: obj.create_category() and returns: category_id