import com.google.gwt.core.linker.CrossSiteIframeLinker; //导入依赖的package包/类
private boolean forceScriptLoad(TreeLogger logger, String moduleName, Float gwtVersion) {
    try {
        ModuleDef module;
        Method getModuleDef;

        if (gwtVersion < 2.6f) {
            getModuleDef = ModuleDefLoader.class.getDeclaredMethod("loadFromClassPath", new Class[] {TreeLogger.class, String.class});
            module = (ModuleDef)getModuleDef.invoke(null, logger, moduleName);
        } else if (gwtVersion < 2.8f) {
            Class compilerContextClass = Class.forName("com.google.gwt.dev.CompilerContext");
            Object context = compilerContextClass.getDeclaredConstructor().newInstance();

            getModuleDef = ModuleDefLoader.class.getDeclaredMethod("loadFromClassPath", new Class[] {TreeLogger.class, compilerContextClass, String.class});
            module = (ModuleDef)getModuleDef.invoke(null, logger, compilerContextClass.cast(context), moduleName);
        } else {
            getModuleDef = ModuleDefLoader.class.getDeclaredMethod("loadFromClassPath", new Class[] {TreeLogger.class, String.class, boolean.class});
            module = (ModuleDef)getModuleDef.invoke(null, logger, moduleName, false);
        }

        if (module != null) return CrossSiteIframeLinker.class.equals(module.getActivePrimaryLinker());
        logger.log(TreeLogger.WARN, "Can't find module reference - not injecting scripts.");

    } catch (Throwable t) {
        logger.log(TreeLogger.ERROR, "Encountered an exception while trying to resolve the ModuleDef for " + moduleName, t);
    }
    return false;
}