If you swipe through all of the cards, and then undo the last one using `matchEngine.rewindMatch()`, you get a Null error. `[ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: Null check operator used on a null value`
If you swipe through all of the cards, and then undo the last one using
matchEngine.rewindMatch(), you get a Null error.[ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: Null check operator used on a null value