Non-nullable property 'Context' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Possible null reference return.

Possible null reference argument for parameter 'topic' in 'MessageHeader.MessageHeader(Id messageId, RoutingKey topic, MessageType messageType, Uri? source = null, string? type = null, DateTimeOffset? timeStamp = null, Id? correlationId = null, RoutingKey? replyTo = null, ContentType? contentType = null, PartitionKey? partitionKey = null, Uri? dataSchema = null, string? subject = null, int handledCount = 0, TimeSpan? delayed = null, TraceParent? traceParent = null, TraceState? traceState = null, Baggage? baggage = null)'.

Non-nullable property 'Value' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Non-nullable property 'Context' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Nullability of reference types in value of type 'Task<MyEvent?>' doesn't match target type 'Task<MyEvent>'.

Possible null reference argument for parameter 'topic' in 'MessageHeader.MessageHeader(Id messageId, RoutingKey topic, MessageType messageType, Uri? source = null, string? type = null, DateTimeOffset? timeStamp = null, Id? correlationId = null, RoutingKey? replyTo = null, ContentType? contentType = null, PartitionKey? partitionKey = null, Uri? dataSchema = null, string? subject = null, int handledCount = 0, TimeSpan? delayed = null, TraceParent? traceParent = null, TraceState? traceState = null, Baggage? baggage = null)'.

Non-nullable property 'Processor' must contain a non-null value when exiting constructor. Consider adding the 'required' modifier or declaring the property as nullable.

Nullability of reference types in type of parameter 'value' of 'void MyEventMessageMapperAsync.Context.set' doesn't match implicitly implemented member 'void IAmAMessageMapperAsync<MyEvent>.Context.set' (possibly because of nullability attributes).