ファイルの電子すかしを取得します。
curl -i -X GET "https://api.box.com/2.0/files/12345/watermark" \
     -H "authorization: Bearer <ACCESS_TOKEN>"await client.fileWatermarks.getFileWatermark(file.id);client.file_watermarks.get_file_watermark(file.id)await client.FileWatermarks.GetFileWatermarkAsync(fileId: file.Id);try await client.fileWatermarks.getFileWatermark(fileId: file.id)client.getFileWatermarks().getFileWatermark(file.getId())BoxFile file = new BoxFile(api, id);
BoxWatermark watermark = file.getWatermark();watermark = client.file(file_id='12345').get_watermark()
print(f'Watermark created at {watermark.created_at} and modified at {watermark.modified_at}')BoxWatermark watermark = await client.FilesManager.GetWatermarkAsync("11111");client.files.getWatermark('11111')
	.then(watermark => {
		/* watermark -> {
			watermark: 
			{ created_at: '2016-10-31T15:33:33-07:00',
				modified_at: '2016-10-31T15:33:33-07:00' } }
		*/
	});{
  "watermark": {
    "created_at": "2012-12-12T10:53:43-08:00",
    "modified_at": "2012-12-12T10:53:43-08:00"
  }
}