1. Dart
2. dart:core
3. Uri
4. hasScheme property

Uri class

1. Constructors
2. Uri
3. dataFromBytes
4. dataFromString
5. directory
6. file
7. http
8. https
9. Properties
10. authority
11. data
12. fragment
13. hasAbsolutePath
14. hasAuthority
15. hasEmptyPath
16. hasFragment
17. hashCode
18. hasPort
19. hasQuery
20. hasScheme
21. host
22. isAbsolute
23. origin
24. path
25. pathSegments
26. port
27. query
28. queryParameters
29. queryParametersAll
30. scheme
31. userInfo
32. runtimeType
33. Methods
34. isScheme
35. normalizePath
36. removeFragment
37. replace
38. resolve
39. resolveUri
40. toFilePath
41. toString
42. noSuchMethod
43. Operators
44. operator ==
45. Static properties
46. base
47. Static methods
48. decodeComponent
49. decodeFull
50. decodeQueryComponent
51. encodeComponent
52. encodeFull
53. encodeQueryComponent
54. parse
55. parseIPv4Address
56. parseIPv6Address
57. splitQueryString
58. tryParse

bool get hasScheme => scheme.isNotEmpty;