Request for the state of the named action within action_group to be
changed to value.
The action must be stateful and value must be of the correct type.
See g_action_group_get_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 g_action_group_get_state_hint().
If the value GVariant is floating, it is consumed.
Since 2.28
Request for the state of the named action within action_group to be changed to value. The action must be stateful and value must be of the correct type. See g_action_group_get_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 g_action_group_get_state_hint(). If the value GVariant is floating, it is consumed. Since 2.28