code: def get(self, key):
          '''
          Get a value for a given key
  
          :param key: entry's key
          :return: corresponding value
          '''
          if key in self._data_fields:
              return self._data_fields[key]
          if key in self._sub_reports:
              return self._sub_reports[key]
          return Nonf get(self, key):
          '''
          Get a value for a given key
  
          :param key: entry's key
          :return: corresponding value
          '''
          if key in self._data_fields:
              return self._data_fields[key]
          if key in self._sub_reports:
              return self._sub_reports[key]
          return None
docs: Get a value for a given key
  
          :param key: entry's key
          :return: corresponding value