result = (result + (byteN and 0b0111_1111)) shl 7
      } else {
        return result + byteN
      }
    }
  }

  /** Read a value as bytes without interpretation of its contents. */
  fun readUnknown(): ByteString = source.readByteString(bytesLeft)

  override fun toString(): String = path.joinToString(separator = " / ")

  companion object {
    /**