code: def add_issue_attribute(self, name, **attrs):
          
          return IssueAttributes(self.requester).create(
              self.id, name, **attrs
          )
docs: 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`