message: Invalidate LazyStringMap when new elements inserted.
diff: @@ -80,6 +80,7 @@ public:
  */
  void put(const Key& key, const StringKeyLabel& value) {
  m_map.insert({key, value});
  + m_fullyInitialized = false;
  }
  /**
  @@ -94,6 +95,7 @@ public:
  if(it == m_map.end()) {
  m_map.insert({key, value});
  + m_fullyInitialized = false;
  return true;
  }
  