@:optionaloptionalwindowBits:Null<Int>
@:optionaloptionalstrategy:Null<Int>
compression only
@:optionaloptionalmemLevel:Null<Int>
@:optionaloptionallevel:Null<Int>
@:optionaloptionalflush:Null<Int>
default: Zlib.Z_NO_FLUSH
Zlib.Z_NO_FLUSH
@:optionaloptionaldictionary:Null<Buffer>
deflate/inflate only, empty dictionary by default
@:optionaloptionalchunkSize:Null<Int>
default: 16*1024