code: def test_objects_namespace():
      for name in dir(seaborn.objects):
          if not name.startswith("__"):
              obj = getattr(seaborn.objects, name)
              assert issubclass(obj, (Plot, Mark, Stat, Move, Scale))
  
imports: import seaborn.objects
  from seaborn._core.plot import Plot
  from seaborn._core.moves import Move
  from seaborn._core.scales import Scale
  from seaborn._marks.base import Mark
  from seaborn._stats.base import Stat
label_desc: Use image node_id 1 for calling a global function with example usage: test_objects_namespace() without return types