private void AddPrimaryKey(string pkTypeName, DataSet <ModelMapper.PrimaryKeyEntry> entries, string keyTypeName, string refTypeName)
{
var document = ModelMapper.AddPrimaryKey(pkTypeName, entries, keyTypeName, refTypeName);
TryApplyChanges(document);
NavigatableMarker = ModelMapper.CreateNavigatableMarker(ModelMapper.NodeKind.PrimaryKey, ModelMapper.ModelType, pkTypeName);
}