Control sequence length for Token Classification with Trainer
In the [new examples](https://github.com/huggingface/transformers/tree/master/examples/pytorch/token-classification) for running token classification training with pytorch and Trainer, there doesn't seem to be an option to control `max_seq_length`.

In the legacy version of the example, `DataTrainingArgs` has such an option, and for the example script without `Trainer` the option is also present.

Am I missing something? Or should I simply provide data samples pre-tokenized to my desired sequence length if I wish to use `Trainer`?

This was tested on v4.9.1.
There is an option to set the `max_seq_length`, introduced in #12929<|||||>That is it! Thank you.