Add a new Issue attribute and return a :class:`IssueAttribute` object.

        :param name: name of the :class:`IssueAttribute`
        :param attrs: optional attributes for :class:`IssueAttribute`

def add_issue_attribute(self, name, **attrs):
        """
        Add a new Issue attribute and return a :class:`IssueAttribute` object.

        :param name: name of the :class:`IssueAttribute`
        :param attrs: optional attributes for :class:`IssueAttribute`
        """
        return IssueAttributes(self.requester).create(
            self.id, name, **attrs
        )