StringJavaDurationConverter
object StringJavaDurationConverter : <ERROR CLASS> ERROR CLASS: Symbol not found for MapTypeConverter<kotlin/String, java/time/Duration>
ISO-8601 String ↔ java.time.Duration (e.g. "PT1H30M").
Note: kotlin.time.Duration ↔ String is a core built-in (com.sahsenvar.kmapper.converter.builtin.DurationStringConverter); this converter covers models that use the java.time type directly.