How to create custom action sets without custom_actions parameter?

[imenelydiaker]

custom_actions is commented in HighlevelActionSetArgs:

BrowserGym/browsergym/experiments/src/browsergym/experiments/benchmark/base.py

Lines 26 to 34 in 91b0e23

	class HighLevelActionSetArgs(DataClassJsonMixin):
	subsets: tuple[HighLevelActionSet.ActionSubset] = field(
	metadata=config(
	encoder=lambda x: list(x),
	decoder=lambda x: tuple(x),
	),
	)
	# custom_actions: list[callable] | None # non-serializable argument, not supported
	multiaction: bool = False

But is needed to create a custom action set:

BrowserGym/browsergym/core/src/browsergym/core/action/highlevel.py

Lines 317 to 322 in 91b0e23

	elif subset == "custom":
	if not custom_actions:
	raise ValueError(
	"'custom' is in 'action_subsets' but 'custom_actions' is empty."
	)
	allowed_actions.extend(custom_actions)

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