export declare const constants: {
    Z_NO_FLUSH: number;
    Z_PARTIAL_FLUSH: number;
    Z_SYNC_FLUSH: number;
    Z_FULL_FLUSH: number;
    Z_FINISH: number;
    Z_BLOCK: number;
    Z_TREES: number;
    Z_OK: number;
    Z_STREAM_END: number;
    Z_NEED_DICT: number;
    Z_ERRNO: number;
    Z_STREAM_ERROR: number;
    Z_DATA_ERROR: number;
    Z_MEM_ERROR: number;
    Z_BUF_ERROR: number;
    Z_NO_COMPRESSION: number;
    Z_BEST_SPEED: number;
    Z_BEST_COMPRESSION: number;
    Z_DEFAULT_COMPRESSION: number;
    Z_FILTERED: number;
    Z_HUFFMAN_ONLY: number;
    Z_RLE: number;
    Z_FIXED: number;
    Z_DEFAULT_STRATEGY: number;
    Z_BINARY: number;
    Z_TEXT: number;
    Z_UNKNOWN: number;
    Z_DEFLATED: number;
};
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