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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).

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

Converting null literal or possible null value to non-nullable type.

Possible null reference return.

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

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

Converting null literal or possible null value to non-nullable type.

Possible null reference return.

Possible null reference argument for parameter 'topic' in 'MessageHeader.MessageHeader(string messageId, RoutingKey topic, MessageType messageType, Uri? source = null, string? type = null, DateTimeOffset? timeStamp = null, string? correlationId = null, RoutingKey? replyTo = null, string contentType = "text/plain", string partitionKey = "", Uri? dataSchema = null, string? subject = null, int handledCount = 0, TimeSpan? delayed = null)'.