public List<ResourceCollection> getByRole(Roles role)
  {
    return role == null ? ImmutableList.<ResourceCollection> of() : getByRole(role.toString());
  }
public List < ResourceCollection > getByRole ( Roles role ) { return role == null ? ImmutableList . < ResourceCollection > of ( ) : getByRole ( role . toString ( ) ) ; }
Returns the list of collections in this set with the given IDPF-reserved
role.