HIDDEN_GROUP_BUFFS_CHANGED

Payload

#	name	type
1	`spellIDs`	number[]

Blizzard's documentation marks the event as synchronous.

implementedThe emulator fires it on its own, from its character and login models. what the statuses mean

GROUP_BUFF_VISUAL_ALERTS_CHANGED · The payload matches GetGroupBuffVisualAlerts, including linked rank spells.
UNIT_AURA · Fires when the auras on a unit change. The payload says which auras were added, updated or removed, so frames can update without rescanning every aura.
AURA_DATA_PROVIDER_SWITCH · Fires when the aura frames switch between the player's real auras and the sample auras Edit Mode shows. Blizzard's aura containers swap their data source.
UNIT_AURA_BLOCK_LIST_CLEARED · Fires when the list of blocked auras on a unit is cleared. Blizzard's private aura frames forget their blocked auras for that unit.