Method letterify

src/main/java/com/github/javafaker/Faker.java:265–267

Returns a string with the '?' characters in the parameter replaced with random alphabetic characters. For example, the string "12??34" could be replaced with a string like "12AB34". @param letterString @return

(String letterString)

     * @return
     */
    public String letterify(String letterString) {
        return fakeValuesService.letterify(letterString);
    }

    /**
     * Returns a string with the '?' characters in the parameter replaced with random alphabetic