toHtml

How to you use the toHtml function.  I have tried it as below.  It gives me an object does not support this method error on the "var myHtml" line.

CKEDITOR.on('instanceReady', function (ev) { 
	// Show the editor name and description in the browser status bar. 
	document.getElementById('eMessage').innerHTML = 'Instance <code>' + ev.editor.name + '<\/code> loaded.'; 
	var myEditor = CKEDITOR.instances.editor1; 
	var myProcessor = new CKEDITOR.htmlDataProcessor(myEditor); 
	var myHtml = myProcessor.toHtml(myEditor.getData()); 
	// Show this sample buttons. document.getElementById('eButtons').style.display = 'block'; 
});