Strings { @Nullable public static String strip(@Nullable String text) { if (text == null) return null; return text.strip(); }  static byte[] bytes(String text); static String format(String pattern, Object... params); static int compare(@Nullable String text1, @Nullable String text2); static boolean isBlank(@Nullable String text); static boolean equals(@Nullable String text1, @Nullable String text2); @Nullable static String truncate(@Nullable String text, int maxLength); @Nullable static String strip(@Nullable String text); static boolean startsWith(String text, char prefix); static String[] split(String text, char delimiter);  }
@Test void strip() { assertThat(Strings.strip(null)).isNull(); assertThat(Strings.strip(" text ")).isEqualTo("text"); }