code: def missingDataValue(self):
          
          value =  getMissingDataValue(self._array)
          fieldNames = self._array.dtype.names
  
          # If the missing value attibute is a list with the same length as the number of fields,
          # return the missing value for field that equals the self.nodeName.
          if hasattr(value, '__len__') and len(value) == len(fieldNames):
              idx = fieldNames.index(self.nodeName)
              return value[idx]
          else:
              return value
docs: Returns the value to indicate missing data.