1. Dart
2. dart:core
3. provisional constant

##### dart:core library

1. Classes
2. BidirectionalIterator
3. BigInt
4. bool
5. Comparable
6. DateTime
7. Deprecated
8. double
9. Duration
10. Expando
11. Function
12. Future
13. int
14. Invocation
15. Iterable
16. Iterator
17. List
18. Map
19. MapEntry
20. Match
21. Null
22. num
23. Object
24. Pattern
25. pragma
26. Provisional
27. RegExp
28. RuneIterator
29. Runes
30. Set
31. Sink
32. StackTrace
33. Stopwatch
34. Stream
35. String
36. StringBuffer
37. StringSink
38. Symbol
39. Type
40. Uri
41. UriData
42. Constants
43. deprecated
44. override
45. provisional
46. proxy
47. Functions
48. identical
49. identityHashCode
50. print
51. Typedefs
52. Comparator
53. Exceptions
54. AbstractClassInstantiationError
55. ArgumentError
56. AssertionError
57. CastError
58. ConcurrentModificationError
59. CyclicInitializationError
60. Error
61. Exception
62. FallThroughError
63. FormatException
64. IndexError
65. IntegerDivisionByZeroException
66. NoSuchMethodError
67. NullThrownError
68. OutOfMemoryError
69. RangeError
70. StackOverflowError
71. StateError
72. TypeError
73. UnimplementedError
74. UnsupportedError

# provisional top-level constant

const provisional = null

An annotation that was used during development of Dart 2.

Should not be used any more.

## Implementation

    const Null provisional = null