code: def test_no_concurrent_changes(app: Page):
      counters = app.locator(".stMarkdown")
      expect(counters.first).to_have_text("0", use_inner_text=True)
  
      button = app.locator(".stButton")
      button.first.click()
      app.wait_for_timeout(300)
  
      counters = app.locator(".stMarkdown")
      c1 = counters.nth(0).inner_text()
      c2 = counters.nth(1).inner_text()
      assert c1 == c2
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_no_concurrent_changes(app) without return types