docstr: method: drop a rg with a non-existing name
  verify: drop successfully
docstr_tok: ["method",":","drop","a","rg","with","a","non-existing","name","verify",":","drop","successfully"]
code: def test_drop_rg_non_existing(self):
      """
      method: drop a rg with a non-existing name
      verify: drop successfully
      """
      self._connect()
      rgs_count = len(self.utility_wrap.list_resource_groups()[0])
      rg_name = "non_existing"
      self.utility_wrap.drop_resource_group(name=rg_name)
      assert rgs_count == len(
          self.utility_wrap.list_resource_groups()[0]
      )
  
imports: import pytest
  from base.client_base import TestcaseBase
  from common import common_func
  from common import common_type
  from common.common_type import CaseLabel, CheckTasks
  from utils.util_pymilvus import *
label_desc: Use image node_id 10 for calling the TestResourceGroupParams obj's underlying member method code with example usage: obj.test_drop_rg_non_existing() without return types