peek abstract method

@override Future<MessageEnvelope?> peek(String? correlationId)

Peeks a single incoming message from the queue without removing it. If there are no messages available in the queue it returns null.

• correlationId (optional) transaction id to trace execution through call chain. Return Future that receives a message or error. Throws errors

Implementation

@override
Future<MessageEnvelope?> peek(String? correlationId);