get_action_state_type

Queries the type of the state of the named action within this.

If the action is stateful then this function returns the VariantType of the state. All calls to change_action_state must give a Variant of this type and get_action_state will return a Variant of the same type.

If the action is not stateful then this function will return null. In that case, get_action_state will return null and you must not call change_action_state.

The state type of a particular action will never change but it is possible for an action to be removed and for a new action to be added with the same name but a different state type.

Parameters:

this	a ActionGroup
action_name	the name of the action to query

Returns:

the state type, if the action is stateful