public @Nonnull Map<String, String> getMappings() {
        return mappings.values().stream().collect(toMap(ContentMapping::getOriginal, ContentMapping::getReplacement));
    }
public @ Nonnull Map < String , String > getMappings ( ) { return mappings . values ( ) . stream ( ) . collect ( toMap ( ContentMapping :: getOriginal , ContentMapping :: getReplacement ) ) ; }
@return the map of original to replacement values known to this instance