Method setValidator

src/jvm/clojure/lang/Var.java:208–212

(IFn vf)

}

public void setValidator(IFn vf){
	if(hasRoot())
		validate(vf, root);
	validator = vf;
}

public Object alter(IFn fn, ISeq args) {
	set(fn.applyTo(RT.cons(deref(), args)));