code: function ZWritable(options) {
  	if(options) {
  		if(options.writableObjectMode) {
  			options.objectMode = true;
  		}
  		//Add support for iojs simplified stream constructor
  		if(typeof options.write === 'function') {
  			this._write = options.write;
  		}
  		if(typeof options.flush === 'function') {
  			this._flush = options.flush;
  		}
  	}
  	Transform.call(this, options);
  	streamMixins.call(this, Transform.prototype, options);
  	writableMixins.call(this, options);
  	
  }
docs: ZWritable implements the Writable stream interface with the _write function.
  ZWritable also accepts a `_flush` function to facilitate cleanup.
  
  @class ZWritable
  @constructor
  @extends Transform
  @uses _Stream
  @uses _Writable
  @param {Object} [options] - Stream options