Uint8List.fromList factory constructor
Uint8List.fromList(Creates a Uint8List with the same length as the elements
list and copies over the elements.
Values are truncated to fit in the list when they are copied, the same way storing values truncates them.
Source
external factory Uint8List.fromList(List<int> elements);
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https://api.dartlang.org/stable/1.24.3/dart-typed_data/Uint8List/Uint8List.fromList.html