code: def test_get(self):
      self.ray_ctx.get()
      assert (
          self.ray_ctx.initialized
      ), "The Ray cluster has been launched."
  
file_path: BigDL/python/orca/test/bigdl/orca/ray/ray_cluster/test_rayctx_local.py
imports: from unittest import TestCase
  import pytest
  import ray
  from bigdl.orca import stop_orca_context
  from bigdl.orca.ray import OrcaRayContext
label_desc: Use image node_id 5 for calling the TestUtil obj's underlying member method code with example usage: obj.test_get() without return types