code: function( stream ){
  			if( typeof stream == 'string' ){
  				//if node.js create a writeable stream with this filename
  			} else if( internals.hasProperties(stream,['write','end','writable'] && stream.writable)){
  				this.objStream = stream;
  			} else {
  			}
  			this._handleBeginSave();
  		}
docs: begin saving
  @param {WritableStream | String} [stream] stream can be a node.js WritableStream, or it can be a filename or undefined