public <S> JdbiImmutables registerModifiable(Class<S> spec) {
        final Class<? extends S> impl = classByPrefix("Modifiable", spec);
        return registerModifiable(spec, impl,
                nullaryMethodOf(impl, "create")
                    .orElseGet(() -> constructorOf(impl)));
    }
Register bean arguments and row mapping for an {@code Modifiable*} value class, expecting the default generated class and public nullary constructor.
@param spec the specification interface or abstract class
@param <S> the specification class
@return a plugin that configures type mapping for the given class
core/src/main/java/org/jdbi/v3/core/mapper/immutables/JdbiImmutables.java