StringUtils.java

class StringUtils {
    public String ensureNonNull( @Nullable String str )
    public static boolean hasContent(@Nullable String str)
    public static String toString(@Nullable Object o) {
    public static String hasContentOrElse(String str, String elseValue )
    public static String hasContentOrCompute(String str, Supplier<String> elseValue )
    public static boolean equalsIgnoreCase(@Nullable String str1, @Nullable String str2)
    public static boolean startsWith(@Nullable String string, String prefix)
    // ...
}