code: function multi(list /*, ... */) {
  		var mw = core.base();
  		mw.targets = (isArray(list) ? list : Array.prototype.slice.call(arguments.length, 0));
  		mw.enabled = true;
  		mw.writeln = function (line) {
  			if (mw.enabled) {
  				for (var i = 0, ii = mw.targets.length; i < ii; i++) {
  					mw.targets[i].writeln(line);
  				}
  			}
  		};
  		mw.toString = function () {
  			return '<miniwrite-multi>';
  		};
  		return mw;
  	}
docs: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - call multiple other writers