1. Dart
2. dart:svg
3. NumberList
4. insertItemBefore method

NumberList class

1. Properties
2. first
3. last
4. length
5. numberOfItems
6. single
7. hashCode
8. isEmpty
9. isNotEmpty
10. iterator
11. reversed
12. runtimeType
13. Methods
14. appendItem
15. clear
16. elementAt
17. getItem
18. initialize
19. insertItemBefore
20. removeItem
21. replaceItem
22. add
23. addAll
24. any
25. asMap
26. cast
27. contains
28. every
29. expand
30. fillRange
31. firstWhere
32. fold
33. followedBy
34. forEach
35. getRange
36. indexOf
37. indexWhere
38. insert
39. insertAll
40. join
41. lastIndexOf
42. lastIndexWhere
43. lastWhere
44. map
45. noSuchMethod
46. reduce
47. remove
48. removeAt
49. removeLast
50. removeRange
51. removeWhere
52. replaceRange
53. retainWhere
54. setAll
55. setRange
56. shuffle
57. singleWhere
58. skip
59. skipWhile
60. sort
61. sublist
62. take
63. takeWhile
64. toList
65. toSet
66. toString
67. where
68. whereType
69. Operators
70. operator []
71. operator []=
72. operator +
73. operator ==

Number insertItemBefore(Number newItem, int index) native;