code: def test_no_label(self):
      overlay = Overlay(
          [
              Curve(range(10)).opts(subcoordinate_y=True)
              for i in range(2)
          ]
      )
      with pytest.raises(
          ValueError,
          match="Every element wrapped in a subcoordinate_y overlay must have a label",
      ):
          bokeh_renderer.get_plot(overlay)
  
imports: import numpy
  import pytest
  from bokeh.models.tools import WheelZoomTool, ZoomInTool, ZoomOutTool
  from holoviews.core import Overlay
  from holoviews.element import Curve
  from holoviews.element.annotation import VSpan
  from .test_plot import TestBokehPlot, bokeh_renderer
label_desc: Use image node_id 3 for calling the TestSubcoordinateY obj's underlying member method code with example usage: obj.test_no_label() without return types