The method 'markNeedsBuild' was called on null. Receiver: null Tried calling: markNeedsBuild()

[pawlowskim]

snappable: 1.0.1

Non-fatal Exception: NoSuchMethodError: The method 'markNeedsBuild' was called on null.
Receiver: null
Tried calling: markNeedsBuild()
0  ???                            0x0 setState + 1168 (framework.dart:1168)
1  ???                            0x0 snap + 150 (snappable.dart:150)

Set state called on unmouted widget. Possible fix: add mounted check before setState