Input event type for actions.
Contains a generic action which can be targeted from several type of inputs. Actions can be created from the project settings menu [code]Project > Project Settings > Input Map[/code]. See [method Node._input].
http://docs.godotengine.org/en/3.0/tutorials/inputs/inputevent.html#actions
- The action's name. Actions are accessed via this [String].
- If [code]true[/code] the action's state is pressed. If [code]false[/code] the action's state is released.