* draw the default geomettry of features
*/
PolygonSymbolizer sym = styleFactory.createPolygonSymbolizer(stroke, fill, null);
Rule rule = styleFactory.createRule();
rule.symbolizers().add(sym);
FeatureTypeStyle fts = styleFactory.createFeatureTypeStyle(new Rule[]{rule});
Style style = styleFactory.createStyle();
style.featureTypeStyles().add(fts);
return style;