El nuevo FeatureManager debería tener al menos estos métodos:

def get(feat) {
	if(deleted.containsKey(feat)){
		return null
	}
	
	if(updated.containsKey(feat)){
		return load(updated.get(feat))
	}
	
	if(inserted.containsKey(feat)){
		return load(updated.get(feat))
	}

	if(original){
		return original
	}

	return feature;
	 
}	
	
def getOriginal(feat)	{
	return original.getOrDefault(feat, feat)
}
	
def insert(feat) {
	inserted.put(feat, save(feat))
}	

def delete(feat) {
	saveOriginal(feat)
	deleted.put(feat, save(feat))
}	

def set(feat, oldFeature) {
	saveOriginal(oldFeature)
	updated.put(feat, save(feat))
}	

def save(feat) {
	guarda la feature en el expansion adapter y devuelve el código asociado a ella
}

def load(feat) {
	recupera la feature del expansion adapter y la devuelve
}

def saveOriginal(feat) {
	if(deleted.containsKey(feat)){
		return
	}
	
	if(updated.containsKey(feat)){
		return
	}
	
	if(inserted.containsKey(feat)){
		return
	}
	
	original.put(feat, save(feat))
	return;
}