How to create custom action sets without custom_actions parameter?

[imenelydiaker]

custom_actions is commented in HighlevelActionSetArgs:

https://github.com/ServiceNow/BrowserGym/blob/91b0e23c882a66a8b4fd3893a9939520cd6e2be1/browsergym/experiments/src/browsergym/experiments/benchmark/base.py#L26-L34

But is needed to create a custom action set:

https://github.com/ServiceNow/BrowserGym/blob/91b0e23c882a66a8b4fd3893a9939520cd6e2be1/browsergym/core/src/browsergym/core/action/highlevel.py#L317-L322

What's the alternative to create custom action sets if not using the "custom" value for subsets ?