code: def test_visible(self):
      element = Curve([1, 2, 3]).opts(visible=False)
      state = self._get_plot_state(element)
      self.assertEqual(state["data"][0]["visible"], False)
  
imports: import numpy
  from holoviews.element import Curve, Tiles
  from .test_plot import TestPlotlyPlot
label_desc: Use image node_id 8 for calling the TestCurvePlot obj's underlying member method code with example usage: obj.test_visible() without return types