public static String randomGraph(final int count) {
        return random(count, 33, 126, false, false);
    }
<p>Creates a random string whose length is the number of characters specified.</p>

<p>Characters will be chosen from the set of characters which match the POSIX [:graph:]
regular expression character class. This class contains all visible ASCII characters
(i.e. anything except spaces and control characters).</p>

@param count the length of random string to create
@return the random string
@since 3.5
android/android_framework/base/src/main/java/lang3/RandomStringUtils.java