IterableIterableExtension<T> extension Null safety

1. Flutter
2. collection
3. IterableIterableExtension extension

collection library

1. Classes
2. BoolList
3. CanonicalizedMap
4. CaseInsensitiveEquality
5. CombinedIterableView
6. CombinedListView
7. CombinedMapView
8. DeepCollectionEquality
9. DefaultEquality
10. DelegatingIterable
11. DelegatingList
12. DelegatingMap
13. DelegatingQueue
14. DelegatingSet
15. Equality
16. EqualityBy
17. EqualityMap
18. EqualitySet
19. HeapPriorityQueue
20. IdentityEquality
21. IterableEquality
22. IterableZip
23. ListEquality
24. ListSlice
25. MapEquality
26. MapKeySet
27. MapValueSet
28. MultiEquality
29. NonGrowableListMixin
30. NonGrowableListView
31. PriorityQueue
32. QueueList
33. SetEquality
34. UnionSet
35. UnionSetController
36. UnmodifiableListView
37. UnmodifiableMapMixin
38. UnmodifiableMapView
39. UnmodifiableSetMixin
40. UnmodifiableSetView
41. UnorderedIterableEquality
42. Extensions
43. ComparatorExtension
44. IterableComparableExtension
45. IterableDoubleExtension
46. IterableExtension
47. IterableIntegerExtension
48. IterableIterableExtension
49. IterableNullableExtension
50. IterableNumberExtension
51. ListComparableExtensions
52. ListExtensions
53. Functions
54. binarySearch
55. compareAsciiLowerCase
56. compareAsciiLowerCaseNatural
57. compareAsciiUpperCase
58. compareAsciiUpperCaseNatural
59. compareNatural
60. equalsIgnoreAsciiCase
61. groupBy
62. hashIgnoreAsciiCase
63. insertionSort
64. lowerBound
65. mapMap
66. maxBy
67. mergeMaps
68. mergeSort
69. minBy
70. reverse
71. shuffle
72. stronglyConnectedComponents
73. transitiveClosure