Bug 55884 Loading a user library from file does not warn when overwriting an existing library [build path]
Works in I2004032400010 + plug-in export for I200403240800 Add library 'mylib'. Save it. Change it. Load library from file. ==> should warn that 'mylib' gets changed.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/UserLibraryPreferencePage.java
initializer.requestClasspathContainerUpdate(path, null, updatedContainer);
				} catch (CoreException e) {
					multiStatus.add(e.getStatus());
				}
			}
			element.collectJavaDocLocations(paths, urls);
			monitor.worked(1);
		}
		Iterator iter= oldNames.iterator();
		while (iter.hasNext()) {
			String name= (String) iter.next();
			
			IPath path= new Path(JavaCore.USER_LIBRARY_CONTAINER_ID).append(name);
			try {
				initializer.requestClasspathContainerUpdate(path, jproject, null);
			} catch (CoreException e) {
				multiStatus.add(e.getStatus());
			}
			monitor.worked(1);
		}
		
		JavaUI.setLibraryJavadocLocations((IPath[]) paths.toArray(new IPath[paths.size()]), (URL[]) urls.toArray(new URL[paths.size()]));
		
		if (!multiStatus.isOK()) {
			throw new CoreException(multiStatus);
		}
	}
	
	private CPUserLibraryElement getSingleSelectedLibrary(List selected) {
		if (selected.size() == 1 && selected.get(0) instanceof CPUserLibraryElement) {