code: def test_position_custom_size_label(self):
      overlay = (
          Curve(range(10), vdims="A").opts(fontsize={"ylabel": "13pt"})
          * Curve(range(10), vdims="B").opts(
              fontsize={"ylabel": "15pt"}
          )
      ).opts(multi_y=True)
      plot = bokeh_renderer.get_plot(overlay)
      assert plot.state.yaxis[0].axis_label == "A"
      assert plot.state.yaxis[0].axis_label_text_font_size == "13pt"
      assert plot.state.yaxis[1].axis_label == "B"
      assert plot.state.yaxis[1].axis_label_text_font_size == "15pt"
  
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 25 for calling the TestCurveTwinAxes obj's underlying member method code with example usage: obj.test_position_custom_size_label() without return types