code: def expected_selection_color(element, lnk_sel):
      if lnk_sel.selected_color is not None:
          expected_color = lnk_sel.selected_color
      else:
          expected_color = element.opts.get(group="style")[0].get(
              "color"
          )
      return expected_color
  
imports: from unittest import skip, skipIf
  import pandas
  import holoviews
  from holoviews.core.options import Cycle, Store
  from holoviews.element import ErrorBars, Points, Rectangles, Table, VSpan
  from holoviews.element.comparison import ComparisonTestCase
  from holoviews.plotting.util import linear_gradient
  from holoviews.selection import link_selections
  from holoviews.streams import SelectionXY
label_desc: Use image node_id 5 for calling the TestLinkSelections obj's underlying member method code with example usage: obj.expected_selection_color(element, lnk_sel) and returns: expected_color