code: def getZeroedOutEncoding(self, n):
      
  
      assert all(field.numRecords>n for field in self.fields)
  
      encoding = np.concatenate([field.encoder.encode(SENTINEL_VALUE_FOR_MISSING_DATA)\
          if field.isPredictedField else field.encodings[n] for field in self.fields])
  
      return encoding
docs: Returns the nth encoding with the predictedField zeroed out