description

# addErrorSync method Null safety

void addErrorSync (

1. Object error,
2. [StackTrace? stackTrace]

)

Adds and delivers an error event.

Adds an error like addError and attempts to deliver it immediately. Delivery can be delayed if other previously added events are still pending delivery, if the subscription is paused, or if the subscription isn't listening yet.

## Implementation

    void addErrorSync(Object error, [StackTrace? stackTrace]);