The three .giffiles are, as you might expect from their names, used by GWT in rendering tree widgets.
三个 .gif 文件，正如您可以从名称推断的那样，将由 GWT 用于显示树小部件。
3
Note: different wireless devices may support different image formats! For example, HTML-capable browsers support GIFfiles and WML-capable browsers support WBMP files.