public IReadOnlyList <LookupType> GetLookupTypes()
 {
     return(_lookupTypes.GetReadonlyList());
 }
 public IReadOnlyList <LUValueType> GetValueTypes()
 {
     return(_valueTypes.GetReadonlyList());
 }
 public IReadOnlyList <Lookup> GetLookups()
 {
     return(_lookups.GetReadonlyList());
 }