code: def test_apply_options_explicit_backend_style_invalid(self):
      err = (
          "Unexpected option 'style_opt3' for ExampleElement type when "
          "using the 'backend_2' extension. Similar options are: "
          r"\['style_opt1', 'style_opt2'\]\."
      )
      with self.assertRaisesRegex(ValueError, err):
          ExampleElement([]).options(
              style_opt3="A", backend="backend_2"
          )
  
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 7 for calling the TestDimensioned_options obj's underlying member method code with example usage: obj.test_apply_options_explicit_backend_style_invalid() without return types