code: func (m *StrictQuad_Ref) ToNative() (qv quad.Value) {
  	if m == nil {
  		return nil
  	}
  	switch v := m.Value.(type) {
  	case *StrictQuad_Ref_Iri:
  		return quad.IRI(v.Iri)
  	case *StrictQuad_Ref_BnodeLabel:
  		return quad.BNode(v.BnodeLabel)
  	default:
  		panic(fmt.Errorf("unsupported type: %T", m.Value))
  	}
  }
docs: // ToNative converts protobuf Value to quad.Value.