void addError(
Object error,
[StackTrace stackTrace]
)

Adds error to the controller's stream.

As StreamController.addError, but must not be called while an event is being added by add, addError or close.

Source

/**
 * Adds error to the controller's stream.
 *
 * As [StreamController.addError], but must not be called while an event is
 * being added by [add], [addError] or [close].
 */
void addError(Object error, [StackTrace stackTrace]);