The superclass 'Bloc<TaxiBookingEvent, TaxiBookingState>' doesn't have a zero argument constructor.
Try declaring a zero argument constructor in 'Bloc<TaxiBookingEvent, TaxiBookingState>', or declaring a constructor in TaxiBookingBloc that explicitly invokes a constructor in 'Bloc<TaxiBookingEvent, TaxiBookingState>'.dart(no_default_super_constructor)
taxi_booking_bloc.dart
The superclass 'Bloc<TaxiBookingEvent, TaxiBookingState>' doesn't have a zero argument constructor. Try declaring a zero argument constructor in 'Bloc<TaxiBookingEvent, TaxiBookingState>', or declaring a constructor in TaxiBookingBloc that explicitly invokes a constructor in 'Bloc<TaxiBookingEvent, TaxiBookingState>'.dart(no_default_super_constructor)