class JavaOther extends Helper {
        private final SecurityActions stack = SecurityActions.stack;
        private final Method definePackage = getDefinePackageMethod();

        private Method getDefinePackageMethod() {
            if (stack.getCallerClass() != this.getClass())
                throw new IllegalAccessError("Access denied for caller.");
            try {
                return SecurityActions.getDeclaredMethod(ClassLoader.class, 
                            "definePackage", new Class[] {
                                String.class, String.class, String.class, String.class,
                                String.class, String.class, String.class, URL.class 
                            });
            } catch (NoSuchMethodException e) {
                throw new RuntimeException("cannot initialize", e);
            }
        }
            
        @Override
        Package definePackage(ClassLoader loader, String name, String specTitle,
                    String specVersion, String specVendor, String implTitle, String implVersion,
                    String implVendor, URL sealBase)
            throws IllegalArgumentException
        {
            if (stack.getCallerClass() != DefinePackageHelper.class)
                throw new IllegalAccessError("Access denied for caller.");
            try {
                definePackage.setAccessible(true);
                return (Package) definePackage.invoke(loader, new Object[] {
                        name, specTitle, specVersion, specVendor, implTitle,
                        implVersion, implVendor, sealBase                                
                    });
            } catch (Throwable e) {
                if (e instanceof InvocationTargetException) {
                    Throwable t = ((InvocationTargetException) e).getTargetException();
                    if (t instanceof IllegalArgumentException)
                        throw (IllegalArgumentException) t;
                }
                if (e instanceof RuntimeException) throw (RuntimeException) e;
            }
            finally {
                definePackage.setAccessible(false);
            }
            return null;
        }
    };

    private static final Helper privileged
        = ClassFile.MAJOR_VERSION >= ClassFile.JAVA_9
          ? new Java9() : ClassFile.MAJOR_VERSION >= ClassFile.JAVA_7
                          ? new Java7() : new JavaOther();

    /**
     * Defines a new package.  If the package is already defined, this method
     * performs nothing.
     *
     * <p>You do not necessarily need to
     * call this method.  If this method is called, then  
     * <code>getPackage()</code> on the <code>Class</code> object returned 
     * by <code>toClass()</code> will return a non-null object.</p>
     *
     * <p>The jigsaw module introduced by Java 9 has broken this method.
     * In Java 9 or later, the VM argument
     * <code>--add-opens java.base/java.lang=ALL-UNNAMED</code>
     * has to be given to the JVM so that this method can run.
     * </p>
     *
     * @param loader        the class loader passed to <code>toClass()</code> or
     *                      the default one obtained by <code>getClassLoader()</code>.
     * @param className     the package name.
     * @see Class#getClassLoader()
     * @see CtClass#toClass()
     */
    public static void definePackage(String className, ClassLoader loader)
        throws CannotCompileException
    {<FILL_FUNCTION_BODY>

        try {
            privileged.definePackage(loader, className, 
                    null, null, null, null, null, null, null);
        }
        catch (IllegalArgumentException e) {
            // if the package is already defined, an IllegalArgumentException
            // is thrown.
            return;
        }
        catch (Exception e) {
            throw new CannotCompileException(e);
        }
    
<no_super_class>