ActivityObjectConverterUtil converts document into all possible ActivityObject
representations based on registered DocumentClassifiers and ActivityObjectConverters.
Ensures generic String Json representation of an Activity can be converted to Activity
BaseObjectNodeActivityConverter is included by default in all
ActivityConverterProcessor
HoconConverterProcessor is a utility processor for converting any datum document
with translation rules expressed as HOCON in the classpath or at a URL.
HoconConverterUtil supports HoconConverterProcessor in converting types via application
of hocon (https://github.com/typesafehub/config/blob/master/HOCON.md) scripts.