code: def test_sync_no_asyncio():
      a = A()
      assert a.async_method_sync() == "async"
      assert a._async_thread is None
  
file_path: ipyparallel/ipyparallel/tests/test_async.py
imports: import pytest
  from ipyparallel._async import AsyncFirst
label_desc: Use image node_id 3 for calling a global function with example usage: test_sync_no_asyncio() without return types