Resetting table with setData

app.js

Ti.UI.setBackgroundColor('#000');

var openButton = Ti.UI.createButton({
	title : 'Open Win'
});

var win = Ti.UI.createWindow({
	title : 'Root Win',
	tabBarHidden : true,
	rightNavButton : openButton
});
var tab = Ti.UI.createTab({
	title : 'Root Tab',
	window : win
});
var grp = Ti.UI.createTabGroup({
	tabs : [tab],
	zIndex : 0
});

grp.open();
win.open();

var testWin = Ti.UI.createWindow();
var table = Ti.UI.createTableView();

testWin.add(table);

var open = function() {
	reset();
	build();
	tab.open(testWin, {
		animated : true
	});
};
var reset = function() {
	table.setData = [];
};
var build = function() {
	addHead();
	addRow();
};
var addHead = function() {
	var row = Ti.UI.createTableViewRow({
		height : 600,
		backgroundColor : 'red',
		selectionStyle : 'none'
	});
	table.appendRow(row);
	table.setContentInsets({
		top : -600
	});
};
var addRow = function() {
	var label = Ti.UI.createLabel({
		text : 'I am a row',
		width : 'auto',
		height : 'auto'
	});
	var row = Ti.UI.createTableViewRow({
		backgroundColor : 'yellow'
	});
	row.add(label);
	table.appendRow(row);
};

openButton.addEventListener('click', open);