Bug 301131 CreateGroupOperation, GroupDescription should be renamed or merged into existing classes
There are some remaining issues related to renamin Groups into Virtual Folders. org.eclipse.ui.internal.ide.undo.GroupDescription IMO should be merged with FolderDescription org.eclipse.ui.ide.undo.CreateGroupOperation should be merged with CreateFolderOperation IDEResourceInfoUtils#GROUP_TEXT org.eclipse.ui.wizards.datatransfer#ImportOperation#setCreateGroups Remy, if you see other related issues, please add a comment to the bug.
bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/actions/CopyFilesAndFoldersOperation.java
|| (sourceParentStore != null && destinationStore
								.equals(sourceParentStore))) {
					return NLS
							.bind(
									IDEWorkbenchMessages.CopyFilesAndFoldersOperation_importSameSourceAndDest,
									sourceStore.getName());
				}
				
				
				IFileStore destinationParent = destinationStore.getParent();
				if (sourceStore.isParentOf(destinationParent)) {
					return IDEWorkbenchMessages.CopyFilesAndFoldersOperation_destinationDescendentError;
				}
				}
			}
		}
		return null;
	}
	/**
	 * Check if the destination is valid for the given source resource.
	 * 
	 * @param destination
	 *            destination container of the operation
	 * @param source
	 *            source resource
	 * @return String error message or null if the destination is valid
	 */
	private String validateLinkedResource(IContainer destination,
			IResource source) {
		if ((source.isLinked() == false) || source.isVirtual()) {