docs: def validate_items(self, input_list):
          """Validates that items in the list are of the type specified.
  
          Returns the input list if it's valid, or raises an ArgumentError if
          it's not."""
          output_list = []
          for item in input_list:
              valid = self.list_item_type.validate(item, self.item_name)
              output_list.append(valid)
  
              # this might lead to confusing error messages.  tbh, we need to
              # figure out a better way to do validation and error handling here,
              # but i'm brute forcing this a bit so that we have something
              # workable
          return output_list