public class MemLeakVM {
	private int idx = 0;
	private Bean bean = new Bean(idx++);
	@Command
	public void refresh() {
		bean = new Bean(idx++);
		BindUtils.postNotifyChange(null, null, this, "bean");
	}
	public Bean getBean() { return bean; }
	public class Bean {
		private final int idx;
		public Bean(int idx) {  this.idx = idx; }
		public int getIdx() { return idx; }
	}
}

<zk>
	<div viewModel="@id('vm') @init('MemLeakVM')">
		<apply obj="@load(vm.bean)">
			<label value="${obj.idx}"/>
		</apply>
		<button onClick="@command('refresh')" label="Refesh"/>
	</div>	
</zk>