public TopicCharacteristic removeTopicCharacteristic(TopicCharacteristic topicCharacteristic) {
getTopicCharacteristics().remove(topicCharacteristic);
topicCharacteristic.setValueListValue(null);
return topicCharacteristic;
}
public TopicCharacteristic addTopicCharacteristic(TopicCharacteristic topicCharacteristic) {
getTopicCharacteristics().add(topicCharacteristic);
topicCharacteristic.setValueListValue(this);
return topicCharacteristic;
}