docs: def certify_parameter(certifier, name, value, kwargs=None):
      """
      Internal certifier for kwargs passed to Certifiable public methods.
  
      :param callable certifier:
          The certifier to use
      :param str name:
          The name of the kwargs
      :param object value:
          The value of the kwarg.
      :param bool required:
          Is the param required. Default=False.
      :raises CertifierParamError:
          A parameter failed internal certification.
      """
      try:
          certifier(value, **kwargs or {})
      except CertifierError as err:
          six.raise_from(
              CertifierParamError(
                  name,
                  value,
              ),
              err)