isNightVisible property Null safety

1. farmershands
2. bar_graph_painter
3. BarGraphPainter
4. isNightVisible property

BarGraphPainter class

1. Constructors
2. BarGraphPainter
3. Properties
4. barHeightRatio
5. barItemsDay
6. barPaint
7. barPaintDark
8. barPaintHighlight
9. barPaintLight
10. barPaintSit
11. barPaintSitHighlight
12. barPaintStand
13. barPaintStandHighlight
14. barSpace
15. barStartOffsetX
16. barWidth
17. baseOffsetY
18. cow
19. current
20. dotPaint1
21. dotPaint2
22. dotPaint3
23. hashCode
24. horizontalLineDashSpace
25. horizontalLineDashWidth
26. horizontalLineHeight
27. horizontalLinePaint
28. horizontalLineVisible
29. hourCntInDay
30. isAvgLineVisible
31. isBiDirectional
32. isGroupAvg
33. isNightVisible
34. isRangeVisible
35. lineDotPaint
36. linePaint
37. maxBarHeight
38. next
39. nightPaint
40. offset
41. prev
42. rangePaint
43. runtimeType
44. semanticsBuilder
45. smoothness
46. temp
47. xLabelBirthDayMargin
48. xLabelBirthDaySize
49. xLabelBirthDayVisible
50. xLabelDayMargin
51. xLabelDaySize
52. xLabelDayVisible
53. xLabelHourMargin
54. xLabelHourSize
55. xLabelHourVisible
56. xLabelValueMargin
57. xLabelValueSize
58. xLabelValueVisible
59. yLabelCount
60. yLabelMargin
61. yLabelSize
62. yLabelVisible
63. yLabelWidth
64. yMaxVal
65. yMinVal
66. ySectionHeight
67. yTopMargin
68. Methods
69. addListener
70. drawAvgLine
71. drawBar
72. drawHorizontalLine
73. drawRangePath
74. drawXLabelBirthDay
75. drawXLabelDay
76. drawXLabelHour
77. drawXLabelValue
78. drawYLabel
79. hitTest
80. noSuchMethod
81. paint
82. removeListener
83. shouldRebuildSemantics
84. shouldRepaint
85. toString
86. Operators
87. operator ==