code: def test_apply_options_current_backend_style_invalid_cross_backend_match(
      self,
  ):
      ExampleElement([]).options(plot_custom2="A")
      substr = (
          "Option 'plot_custom2' for ExampleElement type not valid for "
          "selected backend ('backend_1'). Option only applies to "
          "following backends: ['backend_2']"
      )
      self.log_handler.assertEndsWith("WARNING", substr)
  
imports: import gc
  from holoviews.core.element import Element
  from holoviews.core.options import Keywords, Options, OptionTree, Store
  from holoviews.core.spaces import HoloMap
  from ..utils import LoggingComparisonTestCase
label_desc: Use image node_id 6 for calling the TestDimensioned_options obj's underlying member method code with example usage: obj.test_apply_options_current_backend_style_invalid_cross_backend_match() without return types