How to style LPolygon in PolygonField?

This question is regarding to org.vaadin.addon.leaflet.LPolygon
With setVectorStyle() a new VectorStyle can be set. But I can not find any examples how to use Vectorstyle:
vectorStyle.setDashArray(?)
vectorStyle.setLineJoin(?)
vectorStyle.setLineCap(?)

What I want to achieve is to make the markers of the corners smaller.

17345803.jpg

There is no Java API in the add-on for this, what you could try is to add following into your theme

.leaflet-marker-icon {
    width: 10px !important;
    height: 10px !important;
}

or

.leaflet-vertex-icon {
    width: 10px !important;
    height: 10px !important;
}