docs: static void indent(final int depth, final int indentWidth, final StringBuilder buf) {
          final int maxIndent = INDENT_LEVELS.length - 1;
          for (int d = depth * indentWidth; d > 0;) {
              final int n = Math.min(d, maxIndent);
              buf.append(INDENT_LEVELS[n]);
              d -= n;
          }
      }