docs: public static void writeUnsignedVarint(ByteBuffer buffer, int val) {
      // Extra bytes have the high bit set
      while((val & 0x7F) != val) {
        buffer.put((byte) ((val & 0x7F) | 0x80));
        val >>>= 7;
      }
      // Last byte doesn't have high bit set
      buffer.put((byte) (val & 0x7F));
    }