write(domain).writeByte(NEWLINE)
        }
      }
    }
  }

  private suspend fun writeOutputFile(importResults: ImportResults) =
    withContext(Dispatchers.IO) {
      fileSystem.sink(outputFile).gzip().buffer().use { sink ->
        importResults.writeOut(sink)
      }
    }

  /**
   * These assertions ensure the [PublicSuffixDatabase] remains correct. The specification is