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.navigator.resources/src/org/eclipse/ui/navigator/resources/ResourceDropAdapterAssistant.java
MoveFilesAndFoldersOperation operation = new MoveFilesAndFoldersOperation(
				 getShell());
		operation.copyResources(resources, target);
		if (target != null && target.isAccessible()) {
			try {
				target.refreshLocal(IResource.DEPTH_ONE, null);
			} catch (CoreException e) {
			}
		}
		return Status.OK_STATUS;
	}
	/**
	 * Returns the actual target of the drop, given the resource under the
	 * mouse. If the mouse target is a file, then the drop actually occurs in
	 * its parent. If the drop location is before or after the mouse target and
	 * feedback is enabled, the target is also the parent.
	 */
	private IContainer getActualTarget(IResource mouseTarget) {
		
		if (mouseTarget.getType() == IResource.FILE) {
			return mouseTarget.getParent();
		}
		
		return (IContainer) mouseTarget;
	}
	/**
	 * Returns the resource selection from the LocalSelectionTransfer.
	 * 
	 * @return the resource selection from the LocalSelectionTransfer