TriggerBuilders.Trigger
@RequiresSchemaVersion(major = 1, minor = 200)
public interface TriggerBuilders.Trigger
| TriggerBuilders.OnVisibleOnceTrigger | Triggers only once when the layout visibility state turns from invisible to fully visible for the first time. | 
| TriggerBuilders.OnVisibleTrigger | Triggers when the layout visibility state turns from invisible to fully visible. | 
Interface defining the triggers that can be fired. These triggers can be used to allow acting on events. For example some animations can be set to start based on a trigger.
