docs: def _check_errors(self, errors, prefix):
          """Check for errors and possible raise and format an error message.
  
          :param errors: List of error messages.
          :param prefix: str, Prefix message for error messages
          """
          args = []
  
          for uid, messages in errors:
              error_msg = []
              error_msg.append(prefix % uid)
              for msg in messages:
                  error_msg.append(" (-) %s" % msg)
              args.append("\n".join(error_msg))
  
          if args:
              raise RuntimeError(*args)