in jpa-container/src/main/java/org/apache/aries/jpa/container/weaving/impl/JPAWeavingHook.java [118:126]
public synchronized void removeTransformer(Bundle pBundle, ClassTransformer transformer) {
LinkedHashSet<ClassTransformer> set = registeredTransformers.get(pBundle);
if (set == null || !set.remove(transformer)) {
throw new IllegalStateException("Transformer " + transformer + " not registered");
}
if (set.isEmpty()) {
registeredTransformers.remove(pBundle);
}
}