import com.liferay.portal.service.LayoutSetLocalServiceUtil; //导入依赖的package包/类
protected void deleteMissingLayouts(
		long groupId, boolean privateLayout, Set<Long> newLayoutIds,
		List<Layout> previousLayouts, ServiceContext serviceContext)
	throws Exception {

	// Layouts

	if (_log.isDebugEnabled()) {
		if (newLayoutIds.size() > 0) {
			_log.debug("Delete missing layouts");
		}
	}

	for (Layout layout : previousLayouts) {
		if (!newLayoutIds.contains(layout.getLayoutId())) {
			try {
				LayoutLocalServiceUtil.deleteLayout(
					layout, false, serviceContext);
			}
			catch (NoSuchLayoutException nsle) {
			}
		}
	}

	// Layout set

	LayoutSetLocalServiceUtil.updatePageCount(groupId, privateLayout);
}