public static UsageInfo[] findClassUsages(Project project, PsiMigration migration, String qName, GlobalSearchScope searchScope) {
    PsiClass[] classes = findOrCreateClass(project, migration, qName);

    List<UsageInfo> usages = new ArrayList<>();
    for (PsiClass aClass : classes) {

      usages.addAll(findRefs(aClass, searchScope));
    }
    return usages.toArray(UsageInfo.EMPTY_ARRAY);
  }
public static UsageInfo[] findClassUsages(Project project, PsiMigration migration, String qName, GlobalSearchScope searchScope)