/**
 * * `delivered` - delivered
 * * `not-delivered` - not-delivered
 * * `unknown` - unknown
 * * `not-requested` - not-requested
 */
export declare enum DeliveryStatusEnum {
    DELIVERED = "delivered",
    NOT_DELIVERED = "not-delivered",
    UNKNOWN = "unknown",
    NOT_REQUESTED = "not-requested"
}