1. 构造函数
2. 链接
3. fromRawPath
4. fromUri
5. 属性
6. absolute
7. hashCode
8. isAbsolute
9. parent
10. path
11. runtimeType
12. uri
13. 方法
14. create
15. createSync
16. delete
17. deleteSync
18. exists
19. existsSync
20. noSuchMethod
21. rename
22. renameSync
23. resolveSymbolicLinks
24. resolveSymbolicLinksSync
25. stat
26. statSync
27. target
28. targetSync
29. toString
30. update
31. updateSync
32. watch
33. 操作符
34. 操作符 ==