Bug 221521 [Markers] New markers API needs to be pared down
We have too much API in some of the new classes and they can be moved to internals
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/MarkerContentGenerator.java
return configurationElement
				.getAttribute(MarkerSupportConstants.ATTRIBUTE_NAME);
	}
	/**
	 * Return all of the projects being shown.
	 * 
	 * @param focusResources
	 * @return IResource[]
	 */
	private IResource[] getProjects(IResource[] focusResources) {
		if (focusResources.length == 0)
			return EMPTY_RESOURCE_ARRAY;
		HashSet projects = new HashSet();
		for (int idx = 0; idx < focusResources.length; idx++) {
			projects.add(focusResources[idx].getProject());
		}
		if (projects.isEmpty())
			return EMPTY_RESOURCE_ARRAY;
		return (IResource[]) projects.toArray(new IResource[projects.size()]);
	}
	/**
	 * Get the resources in working set.
	 * 
	 * @param workingSet
	 * @return IResource[]
	 */
	private IResource[] getResourcesInWorkingSet(IWorkingSet workingSet) {
		if (workingSet == null)
			return new IResource[0];
		if (workingSet.isEmpty())