docs: public void initializeFromFile(TreeIndexHeader header, PageFile<N> file) {
      this.dirCapacity = header.getDirCapacity();
      this.leafCapacity = header.getLeafCapacity();
      this.dirMinimum = header.getDirMinimum();
      this.leafMinimum = header.getLeafMinimum();
  
      if(getLogger().isDebugging()) {
        StringBuilder msg = new StringBuilder();
        msg.append(getClass());
        msg.append("\n file = ").append(file.getClass());
        getLogger().debugFine(msg.toString());
      }
  
      this.initialized = true;
    }