public void Add(int artifactId)
    {
        // create the reference to the artifact game data
        var artifactReference = new PD_ArtifactReference(artifactId);

        // add the artifact to the storage
        m_artifactList.Add(artifactReference);
    }
    public void Add(int artifactId)
    {
        // create the reference to the artifact game data
        var artifactReference = new PD_ArtifactReference(artifactId);

        // add the artifact to the storage
        m_artifactList.Add(artifactReference);

        // update the volume used
        m_volumeUsed += artifactReference.GetVolume();
    }