jodd-proxetta/src/main/java/jodd/methref/Methref.java
public String ref(final Object dummy) {
		if (dummy != null) {
			if (dummy instanceof String) {
				return (String) dummy;
			}
			throw new MethrefException("Target method not collected");
		}
		return ref();
	}
public String ref(final Object dummy) {
		if (dummy != null) {
			if (dummy instanceof String) {
				return (String) dummy;
			}
			throw new MethrefException("Target method not collected");
		}
		return ref();
	}
Resolves method name of method reference. Argument is used so {@link #to()}
can be called in convenient way. For methods that returns string,
value will be returned immediately.