.ZLIB_VERSION: Str
.ZLIB_RUNTIME_VERSION: Str

.Compress: ClassType
.Compress.
    compress: (self: .Compress, data: Bytes) -> Bytes
    flush: (self: .Compress, mode := Int) -> Bytes
    copy: (self: .Compress) -> .Compress
.Decompress: ClassType
.Decompress.
    unused_data: Bytes
    unconsumed_tail: Bytes
    eof: Bool
    decompress: (self: .Decompress, data: Bytes, max_length := Nat) -> Bytes
    flush: (self: .Decompress, length := Nat) -> Bytes
    copy: (self: .Decompress) -> .Decompress
.Error = 'error': ClassType

.adler32: (data: Bytes, value := Int) -> Nat
.compress: (data: Bytes, level := -1..9, wbits := Int) -> Bytes
.compressobj: (
    level := -1..9,
    method := Int,
    wbits := Int,
    memLevel := Int,
    strategy := Int
) -> .Compress
.crc32: (data: Bytes, value := Int) -> Nat
.decompress: (data: Bytes, wbits := Int, bufsize := Nat) -> Bytes
.decompressobj: (wbits := Int) -> .Decompress