code: def py_func_get_and_invoke_named_actor():
      java_named_actor = ray.get_actor("java_named_actor")
      assert (
          ray.get(java_named_actor.concat.remote(b"world"))
          == b"helloworld"
      )
      return b"true"
  
imports: import asyncio
  import ray
label_desc: Use image node_id 12 for calling a global function with example usage: py_func_get_and_invoke_named_actor() and returns: bytes