`this.objectMapper.configure(JsonGenerator.Feature.AUTO_CLOSE_TARGET, false); `
Does not make sense: it applies for local `ByteArrayOutputStream` in the `serialize` below.
From other side, Gary, comes to mind a solution with some generic `JsonObjectMapperConfiguration`, which will be mapped to concrate configuration based on `JsonObjectMapper` implementation. E.g. GSON doesn't support similar featuers, but it has `GsonBuilder`. In the end it may look like thankless work to try provide hooks for all existing configuration features in different JSON mapping engines...
WDYT?