public int RemoveRelations(IClassifiable relatable, TaxonomyNode type = null)
{
var rels = relationRepo.GetAllRelationsFor(relatable).AsEnumerable();
if (type != null)
{
rels = rels.Where(r => r.Type != null && r.Type.Id == type.entity.Id);
}
relationRepo.DeleteAll(rels);
return(rels.Count());
}