docs: private static char[] getIndent(int indentSize, Map<Integer, char[]> indentCache) {
          char[] indent = indentCache.get(indentSize);
          if (indent == null) {
              indent = new char[indentSize];
              Arrays.fill(indent, SPACE);
              indentCache.put(indentSize, indent);
          }
  
          return indent;
      }