@Target(value=TYPE)
@Retention(value=RUNTIME)
public @interface JacksonStdImpl
Marker interface used to indicate implementation classes
(serializers, deserializers etc) that are standard ones Jackson
uses; not custom ones that application has added. It can be
added in cases where certain optimizations can be made if
default instances are uses; for example when handling conversions
of "natural" JSON types like Strings, booleans and numbers.