private boolean isAssignableFrom(final String className, final String fromName, final GlobalSearchScope scope) {
    final PsiClass aClass = JavaPsiFacade.getInstance(myProject).findClass(className, scope);
    final PsiClass fromClass = JavaPsiFacade.getInstance(myProject).findClass(fromName, scope);
    if (aClass == null || fromClass == null) {
      return false;
    }
    return InheritanceUtil.isInheritorOrSelf(fromClass, aClass, true);
  }
private boolean isAssignableFrom(final String className, final String fromName, final GlobalSearchScope scope)