ImageUploadEvent

sealed class ImageUploadEvent : BotEvent, BotActiveEvent, AbstractCancellableEvent

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See Also

Failed	`data class Failed : ImageUploadEvent, CancellableEvent`
Succeed	`data class Succeed : ImageUploadEvent, CancellableEvent`

bot	`open val bot: Bot`
source	`abstract val source: ExternalImage`
target	`abstract val target: Contact`

广播一个事件的唯一途径.

suspend fun <E : Event> E.broadcast(): E