code: def test_invisible_extra_axis(self):
      overlay = (
          Curve(range(10), vdims=["A"])
          * Curve(range(10), vdims=["B"]).opts(yaxis=None)
      ).opts(multi_y=True)
      plot = bokeh_renderer.get_plot(overlay)
      assert len(plot.state.yaxis) == 2
      assert plot.state.yaxis[0].visible
      assert not plot.state.yaxis[1].visible
  
imports: from bokeh.models import LinearAxis, LinearScale, LogAxis, LogScale
  from holoviews.element import Curve
  from ...utils import LoggingComparisonTestCase
  from .test_plot import TestBokehPlot, bokeh_renderer
label_desc: Use image node_id 18 for calling the TestCurveTwinAxes obj's underlying member method code with example usage: obj.test_invisible_extra_axis() without return types