public void setFilterContext(final GeocacheFilterContext filterContext) {
        if (wpOverlay != null) {
            wpOverlay.setFilterContext(filterContext);
        }
        if (baseOverlay != null) {
            baseOverlay.setFilterContext(filterContext);
        }
        if (storedOverlay != null) {
            storedOverlay.setFilterContext(filterContext);
        }
        if (liveOverlay != null) {
            liveOverlay.setFilterContext(filterContext);
        }
    }
Forces redraw of all cache layers (e.g. for icon change)
main/src/main/java/cgeo/geocaching/maps/mapsforge/v6/caches/CachesBundle.java