code: def test_is_static_method():
      class A:
          @staticmethod
          def a(self):
              pass
  
          @staticmethod
          def b(a):
              pass
  
          def c(self):
              pass
  
      assert is_static_method(A, "a")
      assert is_static_method(A, "b")
      assert not is_static_method(A, "c")
  
imports: from functools import partial
  from unittest import mock
  import pytest
  from lightning.app import LightningApp, LightningFlow, LightningWork
  from lightning.app.core.flow import _RootFlow
  from lightning.app.frontend import StaticWebFrontend
  from lightning.app.utilities.app_helpers import AppStatePlugin, BaseStatePlugin, InMemoryStateStore, StateStore, _is_headless, _MagicMockJsonSerializable, is_overridden, is_static_method
  from lightning.app.utilities.exceptions import LightningAppStateException
label_desc: Use image node_id 5 for calling a global function with example usage: test_is_static_method() without return types