Look at using Arguments.defer

[wsargent]

From logfellow/logstash-logback-encoder#396

Arguments are resolved through

https://github.com/tersesystems/blindsight/blob/master/logstash/src/main/scala/com/tersesystems/blindsight/logstash/LogstashArgumentResolver.scala

but there is no defer in place and so the argument will be rendered (taking up memory) even if the statement never gets logged.

Lazy logging should be able to ameliorate this somewhat, and the defer itself does add a small amount of allocation in the wrapper... so maybe make this optional?