code: def getParent(self, returned_properties=None):
          
  
          parent_tag = ("rtc_cm:com.ibm.team.workitem.linktype."
                        "parentworkitem.parent")
          rp = returned_properties
          parent = (self.rtc_obj
                        ._get_paged_resources("Parent",
                                              workitem_id=self.identifier,
                                              customized_attr=parent_tag,
                                              page_size="5",
                                              returned_properties=rp))
  
          # No more than one parent
          if parent:
              # only one element
              return parent[0]
          return None
docs: Get the parent workitem of this workitem
  
          If no parent, None will be returned.
  
          :param returned_properties: the returned properties that you want.
              Refer to :class:`rtcclient.client.RTCClient` for more explanations
          :return: a :class:`rtcclient.workitem.Workitem` object
          :rtype: rtcclient.workitem.Workitem