Type '<T extends string>(event: T, data?: InferCustomEventPayload<T> | undefined) => void' is not assignable to type '<T extends string>(event: T, data?: InferCustomEventPayload<T> | undefined) => Promise<void>'.

Type '<T extends string>(event: T, data?: InferCustomEventPayload<T> | undefined) => void' is not assignable to type '<T extends string>(event: T, data?: InferCustomEventPayload<T> | undefined) => Promise<void>'.