// (c) Tuomas J. Lukka package org.fenfire.util; import org.fenfire.Obs; /** An easy way to chain Observers into a set. */ public class ObsDoubler implements Obs { Obs o1, o2; public ObsDoubler(Obs o1, Obs o2) { this.o1 = o1; this.o2 = o2; } public void chg() { o1.chg(); o2.chg(); } }