Base class for BT actions. Base class for all behavior tree actions. Extend [code]BTAction[/code] to create your own actions. An action performs a task in one or multiple ticks. Actions return [code]RUNNING[/code] status, when it takes more than one tick to perform a task. When a task is finished an action returns [code]SUCCESS[/code] or [code]FAILURE[/code]. Actions cannot have child tasks.