get_action_parameter_type

Queries the type of the parameter that must be given when activating the named action within this.

When activating the action using activate_action, the Variant given to that function must be of the type returned by this function.

In the case that this function returns null, you must not give any Variant, but null instead.

The parameter 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 parameter type.

Parameters:

this	a ActionGroup
action_name	the name of the action to query

Returns:

the parameter type