BookState

[nassimbjf]

WHY THIS FUNCTION IS UNDERLINED BY RED COLOR
@OverRide
Stream mapEventToState(currentState, event) async* {
if (event is FetchBook && !_hasReachedMax(currentState)) {
try {
if (currentState is BookUninitialized) {
final books = await _fetchBooks(0, 20);
yield BookInitialized.success(books);
}
if (currentState is BookInitialized) {
final books = await fetchBooks(currentState.books.length, 20);
yield books.isEmpty
? currentState.copyWith(hasReachedMax: true)
: BookInitialized.success(currentState.books + books);
}
} catch () {
yield BookInitialized.failure();
}
}
}

[lohanidamodar]

Also paste the output of your flutter doctor command! May be issue with dart version?