Bug 173902 remove EXPERIMENTAL markings from 3.3 IDE Undo API
Need to remove the EXPERIMENTAL javadoc from the new API I introduced in 3.3. See org.eclipse.ui.ide.undo org.eclipse.jface.fieldassist
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/undo/WorkspaceUndoUtil.java
IResource.KEEP_HISTORY, new SubProgressMonitor(monitor,
								1));
				fileDescription.recordStateFromHistory(existingFile,
						new SubProgressMonitor(monitor, 1));
				
				
				
				
				if (deleteSourceFile) {
					file.delete(IResource.KEEP_HISTORY, new SubProgressMonitor(
							monitor, 1));
				}
				monitor.done();
				return fileDescription;
			}
		}
		monitor.done();
		return null;
	}
	/*
	 * Check for existence of the specified path and generate any containers
	 * that do not yet exist. Return any generated containers, or null if no
	 * container had to be generated.
	 */
	private static IContainer generateContainers(IPath path)
			throws CoreException {
		IResource container;
		if (path.segmentCount() == 0) {
			
			return null;