Request for the state of the named action within this to be changed to value.
The action must be stateful and value must be of the correct type. See
get_action_state_type.
This call merely requests a change. The action may refuse to change its state or may change its state to something other than value
. See get_action_state_hint.
If the value GVariant is floating, it is consumed.
| this | |
| action_name |
the name of the action to request the change on |
| value |
the new state |