public override string ToString()
        {
            var sb = new System.Text.StringBuilder();

            sb.AppendLine("GameObject: " + (gameObject != null ? gameObject.name : null));
            sb.AppendLine("ProBuilderMesh: " + (mesh != null ? mesh.name : null));
            sb.AppendLine("Face: " + (face != null ? face.ToString() : null));
            sb.AppendLine("Edge: " + edge.ToString());
            sb.AppendLine("Vertex: " + vertex);
            return(sb.ToString());
        }