Bug 296691 Change new Groups API to Virtual Resource API
If we decide that 'virtual' is the right naming for new resources concept, I will make the following changes. Add IResource#VIRTUAL flag to use in #create methods Add IResource#isVirtual indicating that a resource is virtual Remove IResource#isGroup Remove IFolder#createGroup
bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/actions/CopyFilesAndFoldersOperation.java
* @param fileNames
	 * @return IFileStore[]
	 */
	private IFileStore[] buildFileStores(final String[] fileNames) {
		IFileStore[] stores = new IFileStore[fileNames.length];
		for (int i = 0; i < fileNames.length; i++) {
			IFileStore store = IDEResourceInfoUtils.getFileStore(fileNames[i]);
			if (store == null) {
				reportFileInfoNotFound(fileNames[i]);
				return null;
			}
			stores[i] = store;
		}
		return stores;
	}
	/**
	 * Report that a file info could not be found.
	 * 
	 * @param fileName
	 */
	private void reportFileInfoNotFound(final String fileName) {
		messageShell.getDisplay().syncExec(new Runnable() {
			public void run() {
				ErrorDialog
						.openError(
								messageShell,
								getProblemsTitle(),
								NLS
										.bind(
												IDEWorkbenchMessages.CopyFilesAndFoldersOperation_infoNotFound,