public static synchronized final PackageReflection createReflection(Package pack)
{
if (pack == null) {
pack = Object.class.getPackage();
}
PackageReflection reflection = (PackageReflection)_reflections.get(pack);
if (reflection == null) {
reflection = new PackageReflection(pack);
_reflections.put(pack, reflection);
}
return reflection;
}