Now that i check it more thoroughly, there's an `all_inverted_fields` attribute that should contain all the fields' names. We used it in predict method because we checked that the field names in the input data matched the ones in the model. I don't know if this is really needed. The result was getting rid of the input data value but we did show a message:
```python
                if wrong_keys:
                    LOGGER.info("Wrong field names in input data: %s" %
                                ", ".join(wrong_keys))
```