Placing Icon in Context menu

Hello.

Tried to find, but without any luck.

I’m composing a context menu add-on, so want to include an icon in context items.
Is that possible? Tried with this addon.xml:

Code:
<extension point="kodi.context.item">
        <menu id="kodi.core.main">
            <item library="context_play.py">
                <label>32000</label>
                <icon>special://userdata/addon_data/context.custom/icon.png</icon>
                <visible>String.IsEqual(ListItem.DBTYPE,episode) | String.IsEqual(ListItem.DBTYPE,movie)</visible>
            </item>
        </menu>
    </extension>