Error previously thrown when control reaches the end of a switch case.
The pre-2.0 Dart specification required this error to be thrown when
control reached the end of a switch case (except the last case
of a switch) without meeting a
break or other control flow operators.
That kind of fall-through was made a compile-time error Dart 2.0,
so this error is no longer thrown.
The hash code for this object.
A representation of the runtime type of the object.
The stack trace at the point where this error was first thrown.
Invoked when a non-existent method or property is accessed.
A string representation of this object.