public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) throws IllegalClassFormatException {
        try {
          if (className == null || className.indexOf('$') >= 0) {
            // non-toplevel Groovy classes don't have timestamp fields, so don't Java classes and lambdas
            // let's not care about presumably rare dollar-named Groovy classes
            return null;
          }

          if (classBeingRedefined != null) {
            Field callSiteArrayField = classBeingRedefined.getDeclaredField("$callSiteArray");
            callSiteArrayField.setAccessible(true);
            callSiteArrayField.set(null, null);
          }
          return removeTimestampField(classfileBuffer);
        } catch (Throwable ignored) {
          return null;
        }
      }
public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer)