docs: def get_sla_by_id(self, issue_id_or_key, sla_id):
          """
          Get the SLA information for a customer request for a given request ID or key and SLA metric ID
          IMPORTANT: The calling user must be an agent
  
          :param issue_id_or_key: str
          :param sla_id: str
          :return: SLA information
          """
          url = 'rest/servicedeskapi/request/{0}/sla/{1}'.format(issue_id_or_key, sla_id)
  
          return self.get(url)