code: def test_image_stack_good(self):
      renderer = bmr.GlyphRenderer(data_source=ColumnDataSource())
      renderer.glyph = ImageStack(
          color_mapper=WeightedStackColorMapper()
      )
      cb = renderer.construct_color_bar(title="Title")
      assert isinstance(cb, ColorBar)
      assert cb.color_mapper is renderer.glyph.color_mapper
      assert cb.title == "Title"
  
imports: from __future__ import annotations
  import pytest
  from bokeh.core.validation.check import ValidationIssue
  from bokeh.models import ColorBar, ColumnDataSource, GeoJSONDataSource, Image, ImageRGBA, ImageStack, IndexFilter, Line, MultiLine, Patch, Scatter, Text, WebDataSource, WeightedStackColorMapper
  from bokeh.transform import linear_cmap, log_cmap
  import bokeh.models.renderers
label_desc: Use image node_id 8 for calling the TestGlyphRenderer_construct_color_bar obj's underlying member method code with example usage: obj.test_image_stack_good() without return types