Analyzing aii_flutter... info • The value of the local variable 'timer' isn't used • lib/exam/Exam.dart:66:11 • unused_local_variable info • The value of the local variable 'timer' isn't used • ...

Flutter (Channel stable, v1.12.13+hotfix.8, on Mac OS X 10.15.3 19D76, locale ja-JP) I've been trying many different solutions within the past few days, and I really can't figure out how to make an ...