Method alter

src/jvm/clojure/lang/Ref.java:169–172

(IFn fn, ISeq args)

}

public Object alter(IFn fn, ISeq args) {
	LockingTransaction t = LockingTransaction.getEx();
	return t.doSet(this, fn.applyTo(RT.cons(t.doGet(this), args)));
}

public void touch(){
	LockingTransaction.getEx().doEnsure(this);