Not documented.
Source
ZLibEncoder({this.gzip: false,
this.level: ZLibOption.DEFAULT_LEVEL,
this.windowBits: ZLibOption.DEFAULT_WINDOW_BITS,
this.memLevel: ZLibOption.DEFAULT_MEM_LEVEL,
this.strategy: ZLibOption.STRATEGY_DEFAULT,
this.dictionary: null,
this.raw: false}) {
_validateZLibeLevel(level);
_validateZLibMemLevel(memLevel);
_validateZLibStrategy(strategy);
_validateZLibWindowBits(windowBits);
}