question: static String addPrefixIfNotAlreadyThere ( final String noun , final String prefixSingular , final String prefixPlural ) { if ( noun . startsWith ( prefixSingular ) ) { return noun ; } else if ( noun . startsWith ( prefixPlural ) ) { return noun ; } else { return prefixSingular + noun ; } }
target:  Adds a prefix unless it was already added.