code: def greenlet_not_imported():
      assert "greenlet" not in sys.modules
      assert "sqlalchemy" not in sys.modules
  
      import sqlalchemy
      import sqlalchemy.util.concurrency  # noqa: F401
      from sqlalchemy.util import greenlet_spawn  # noqa: F401
      from sqlalchemy.util.concurrency import await_  # noqa: F401
  
      assert "greenlet" not in sys.modules
  
imports: import asyncio
  import sys
label_desc: Use image node_id 1 for calling a global function with example usage: greenlet_not_imported() without return types