checkState function
Throws a StateError if the given expression is false.
Implementation
void checkState(bool expression, {message}) {
if (!expression) {
throw new StateError(_resolveMessage(message, 'failed precondition'));
}
}Throws a StateError if the given expression is false.
void checkState(bool expression, {message}) {
if (!expression) {
throw new StateError(_resolveMessage(message, 'failed precondition'));
}
}