private static Method getMethodNewInstanceFromObjectInputStream()
    {
        try
        {
            return java.io.ObjectInputStream.class.getDeclaredMethod(
                    "newInstance", Class.class, Class.class);
        }
        catch (Exception e)
        {
            return null;
        }
    }
If true, sun.misc.Unsafe is used to access the fields of the objects instead of plain java reflections. Enabled
by default if running on a sun jre.
protostuff-runtime-md/src/main/java/io/protostuff/runtime/RuntimeEnv.java