How can I change the tick shape of the jFXSlider to a circle shape from a line?

I want to change the shape of the slider tick from a line to a circle. I have looked through the CSS reference guide but I cannot seem to find anything relevant. Is it even possible? Doesn't matter if it is using CSS or declaratively from main JavaFX script.

I have tried using the following CSS snippet, but it doesn't work.

.slider .axis .axis-tick-mark {
    -fx-shape: "circle";
}