@Test @DisplayName("lcase converts properly null string") void lcaseConvertsNull() { assertNull(null, lcase(null)); }
public static String lcase(String s) { return xcase(s, Character::toLowerCase); }
CaseTools { public static String lcase(String s) { return xcase(s, Character::toLowerCase); } }
CaseTools { public static String lcase(String s) { return xcase(s, Character::toLowerCase); }  }
CaseTools { public static String lcase(String s) { return xcase(s, Character::toLowerCase); }  static String lcase(String s); static String ucase(String s); static String camel(String s); static String snake(String s); }
CaseTools { public static String lcase(String s) { return xcase(s, Character::toLowerCase); }  static String lcase(String s); static String ucase(String s); static String camel(String s); static String snake(String s);  }