Is it possible to reduce the number of css style names in Vaadin?

Question

E.g., in the example below, is it possible to get rid of all the class names except my own, w-grid? Or at least reduce the number?

<div class="v-csslayout v-layout v-widget w-grid v-csslayout-w-grid
root_Z_Template v-csslayout-root_Z_Template v-has-width v-has-height"
style="position: absolute; width: 100%; height: 100%;" id="root_Z_Template">