| Return the Theme instance for the given theme name.
The returned Theme will resolve theme-specific messages, codes,
file paths, etc (e.g. CSS and image files in a web environment).
Parameters: themeName - the name of the theme the corresponding Theme, or null if none defined.Note that, by convention, a ThemeSource should at least be able toreturn a default Theme for the default theme name "theme" but may alsoreturn default Themes for other theme names. See Also: org.springframework.web.servlet.theme.AbstractThemeResolver.ORIGINAL_DEFAULT_THEME_NAME |