Not sure if that’s the right technical term.
Anyway, is there a way of reproducing what the composer wrote in this manuscript? It’s a violin part and the player should play the open D string double stopped with a finger on the G string.
If not, I guess the workaround is to use 2 voices as here
…but I wonder of there’s a way of making it look like the composer wrote it? It would help if there was a notehead style, for instance.