/**
 * Symbols are passed into sockets and thus processors to convey in-band
 * information on the stream of packets.
 */
export declare enum PacketSymbol {
    VOID = 0,
    WAIT = 1,
    WAIT_BUT_Q = 2,
    RESUME = 3,
    FLUSH = 4,
    GAP = 5,
    EOS = 6,
    DROP = 7,
    DROP_Q = 8,
    SYNC = 9
}