Stores the current pose values for an {@link Event}.
See Timeline {@link Timeline#apply(Skeleton, float, float, com.badlogic.gdx.utils.Array, float, com.esotericsoftware.spine.Animation.MixBlend, com.esotericsoftware.spine.Animation.MixDirection)}, AnimationStateListener {@link AnimationStateListener#event(com.esotericsoftware.spine.AnimationState.TrackEntry, Event)}, and Events in the Spine User Guide.