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
* is halted while the resources are copied using a
	 * WorkspaceModifyOperation. This method should be called from the UI
	 * Thread.
	 * 
	 * @param uris
	 *            the URIs to copy
	 * @param destination
	 *            destination to which files will be copied
	 * @see WorkspaceModifyOperation
	 * @see Display#getThread()
	 * @see Thread#currentThread()
	 * @since 3.2
	 */
	public void copyFiles(URI[] uris, IContainer destination) {
		IFileStore[] stores = buildFileStores(uris);
		if (stores == null) {
			return;
		}
		copyFileStores(destination, stores, true, null);
	}
	/**
	 * Copies the given files and folders to the destination without forking a
	 * new Thread or blocking using a WorkspaceModifyOperation. It is
	 * recommended that this method only be called from a {@link WorkspaceJob}
	 * to avoid possible deadlock.
	 * 
	 * @param uris
	 *            the URIs to copy
	 * @param destination
	 *            destination to which URIS will be copied