function isLastPageContentCustomTab() {
		// ToDo: make this into enumeration
		var aPageIds = [
			-1, // not set
			0,  // sort
			1,  // group
			2,  // filter
			3   // filter detail
		];
		return (this._getPage1().getContent().length && aPageIds.indexOf(this._vContentPage) === -1);
	}
Determine if the last opened page has custom tab contents
@private
@returns {boolean} Whether the last opened page has custom tab contents