Flux.1-dev lora training not support trigger word parameter？

[Nine98]

Hello, I have a question for you.
When I use flux_train_network.py to train flux lora, I want to pass the trigger word parameter, but I found that this parameter is not exposed in the code. I want to know whether the trigger word parameter is already supported and I just didn't find it, or whether the trigger word parameter is not supported at present? If it is not supported at present, when will it be supported?
Thank you