code: def referenced_by(self):
          
          href = fetch_entry_point('references_by_element')
          return [Element.from_meta(**ref)
                  for ref in self.make_request(
                      method='create',
                      href=href,
                      json={'value': self.href})]
docs: Show all references for this element. A reference means that this
          element is being used, for example, in a policy rule, as a member of
          a group, etc.
  
          :return: list referenced elements
          :rtype: list(Element)