Jdk8Module._cfgHandleAbsentAsNull
: enabling means that `Optional.empty()` values
are handled like Java nulls (wrt filtering on serialization); disabling that
they are only treated as "empty" values, but not like native Java nulls.BeanSerializerModifier
needed to sneak in handler to exclude "absent"
optional values iff handling of "absent as nulls" is enabled.Copyright © 2014–2015 FasterXML. All rights reserved.