### Question:
CustomStringApi { public static String delete(String line, String toDelete) { return line.replace(toDelete, ""); }  static String findGroup(String regex, String line); static String findGroupOrDefault(String regex, String line, String defaultValue); static String base64(String line); static String delete(String line, String toDelete); static String substringAfterFirst(String line, String substring); static String substringAfterLast(String line, String substring);  }### Answer:
@Test void testDelete() { assertEquals("hello", delete("h.e.l.l.o", ".")); }