docs: def query_schema(query_params_schema, min_version=None,
                   max_version=None):
      """Register a schema to validate request query parameters."""
  
      def add_validator(func):
          @functools.wraps(func)
          def wrapper(*args, **kwargs):
              if 'req' in kwargs:
                  req = kwargs['req']
              else:
                  req = args[1]
  
              if req.environ['wsgiorg.routing_args'][1]:
                  if _schema_validation_helper(query_params_schema,
                                          req.environ['wsgiorg.routing_args'][1],
                                          args, kwargs, is_body=False):
                      _remove_unexpected_query_parameters(query_params_schema,
                                                           req)
              else:
                  if _schema_validation_helper(query_params_schema,
                                              req.GET.dict_of_lists(),
                                              args, kwargs, is_body=False):
                      _remove_unexpected_query_parameters(query_params_schema,
                                                           req)
              return func(*args, **kwargs)
          return wrapper
  
      return add_validator