public void setMetaClass(Object obj, MetaClass theMetaClass) {
Class theClass = obj.getClass();
final ClassInfo info = ClassInfo.getClassInfo(theClass);
MetaClass oldMC = null;
info.lock();
try {
oldMC = info.getPerInstanceMetaClass(obj);
info.setPerInstanceMetaClass(obj, theMetaClass);
} finally {
info.unlock();
}
fireConstantMetaClassUpdate(obj, theClass, oldMC, theMetaClass);
}
