Add back FactoryHelper.toClass(ClassFile cf, ClassLoader loader, Prot…

…ectionDomain domain) for backward compatibility in minor release.

src/main/javassist/util/proxy/FactoryHelper.java

@@ -113,6 +113,24 @@ public static Class<?> toClass(ClassFile cf, ClassLoader loader)
         return toClass(cf, null, loader, null);
     }
 
+    /**
+     * Loads a class file by a given class loader.
+     *
+     * @param loader        The class loader.  It can be null if {@code neighbor}
+     *                      is not null.
+     *
+     * @param domain        if it is null, a default domain is used.
+     * @since 3.3
+     *
+     * @see #toClass(ClassFile,Class,ClassLoader,ProtectionDomain)
+     * @deprecated
+     */
+    public static Class<?> toClass(ClassFile cf, ClassLoader loader, ProtectionDomain domain)
+        throws CannotCompileException
+    {
+        return toClass(cf, null, loader, domain);
+    }
+
     /**
      * Loads a class file by a given class loader.
      *