code: def _options_error(cls, opt, objtype, backend, valid_options):
          
          current_backend = Store.current_backend
          loaded_backends = Store.loaded_backends()
          kws = Keywords(values=valid_options)
          matches = sorted(kws.fuzzy_match(opt))
          if backend is not None:
              if matches:
                  raise ValueError('Unexpected option %r for %s type '
                                   'when using the %r extension. Similar '
                                   'options are: %s.' %
                                   (opt, objtype, backend, matches))
              else:
                  raise ValueError('Unexpected option %r for %s type '
                                   'when using the %r extension. No '
                                   'similar options founds.' %
                                   (opt, objtype, backend))
  
          # Check option is invalid for all backends
          found = []
          for lb in [b for b in loaded_backends if b != backend]:
              lb_options = Store.options(backend=lb).get(objtype)
              if lb_options is None:
                  continue
              for g, group_opts in lb_options.groups.items():
                  if opt in group_opts.allowed_keywords:
                      found.append(lb)
          if found:
              param.main.param.warning(
                  'Option %r for %s type not valid for selected '
                  'backend (%r). Option only applies to following '
                  'backends: %r' % (opt, objtype, current_backend, found))
              return
  
          if matches:
              raise ValueError('Unexpected option %r for %s type '
                               'across all extensions. Similar options '
                               'for current extension (%r) are: %s.' %
                               (opt, objtype, current_backend, matches))
          else:
              raise ValueError('Unexpected option %r for %s type '
                               'across all extensions. No similar options '
                               'found.' % (opt, objtype))
docs: Generates an error message for an invalid option suggesting
          similar options through fuzzy matching.