The skin's AnimationGraphData. There is no fallback to another skin's graph or to a default graph.
When the graph loads, the client goes through every clip in mClipDataMap that has an
event map (mEventDataMap). For each
ParticleEventData in those maps whose mEffectName ends
in .troy (any case), it preloads that particle effect. Particle events that use only
mEffectKey are not preloaded here.
Shipped data sets it on every skin.