Example: compiling and runtime errors

[javaone199]

The example https://pub.dev/packages/multi_select_flutter/example.

has compiling errors. After fixing them, got runtime error:

════════ Exception caught by widgets library ═══════════════════════════════════ type '(List<Animal>) => Null' is not a subtype of type '((List<Animal?>) => dynamic)?'

[shinriyo]

and it is too old.

[shinriyo]

related? https://github.com/CHB61/multi_select_flutter/issues/80