Bug 82231 [build path] Hard to find type restriction compiler problem preferences
I20050104-1600 There compiler preference page contains a Warning/Error node with many sub-entries . I tried to find where I could change the 'warning' for the access of internal types to 'error'. No luck until I realized that the Build node also contains Warning/Error settings.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/ProjectsWorkbookPage.java
private void projectPageCustomButtonPressed(DialogField field, int index) {
		CPListElement[] entries= null;
		switch (index) {
		case IDX_ADDPROJECT: 
			entries= openProjectDialog(null);
			break;			
		case IDX_EDIT: 
			editEntry();
			return;
		case IDX_REMOVE: 
			removeEntry();
			return;			
		}
		if (entries != null) {
			int nElementsChosen= entries.length;					
			
			List cplist= fProjectsList.getElements();
			List elementsToAdd= new ArrayList(nElementsChosen);
			for (int i= 0; i < nElementsChosen; i++) {
				CPListElement curr= entries[i];
				if (!cplist.contains(curr) && !elementsToAdd.contains(curr)) {
					elementsToAdd.add(curr);
				}
			}
						
			fProjectsList.addElements(elementsToAdd);
			if (index == IDX_ADDPROJECT) {
				fProjectsList.refresh();
			}