public byte[] transform(ClassLoader loader, String className, Class<?> clazz, ProtectionDomain domain, byte[] bytes) {

        try {
            return transform0(className, clazz, domain, bytes);
        } catch (Exception e) {
            System.err.println("Could not instrument " + className);
            e.printStackTrace();
            return bytes;
        }
    }
Should LogTransformer be verbose in what it does? This currently list the
names of the classes being processed.

@param b
@return
slf4j-ext/src/main/java/org/slf4j/instrumentation/LogTransformer.java