// Get all dependencies introduced by defaults.css from SWCs.
final ImmutableList<IDefinition> definitions =
Target.getAllExternallyVisibleDefinitions(allCompilationUnitsInTarget);
final Collection<ICompilationUnit> cssDependencies = new HashSet<ICompilationUnit>();
for (final ICSSDocument cssDocument : activatedStyleSheets.all())
{
// Side-effects of this method:
// 1. Resolve all type selectors in the CSS model to IClassDefinition definitions.
// 2. Activate CSS rules whose subject is in the definition set.
final Collection<ICompilationUnit> dependentCUListFromCSS =