getFileInfo abstract method
Get whiteboard file information with specific fileId
Parameter fileId
Whiteboard file ID
Returns
- non-null: whiteboard file information
- others: Failure
获取指定白板文件ID的白板文件信息
Parameter fileId
白板文件ID
Returns
- 非空:白板文件信息
- 空:失败
Implementation
Future<WBDocInfo?> getFileInfo(String fileId);