src/main/java/org/jfree/graphics2d/svg/SVGGraphics2D.java
private String getSVGFillStyle() {
        StringBuilder b = new StringBuilder();
        b.append("fill: ").append(svgColorStr()).append("; ");
        b.append("fill-opacity: ").append(getColorAlpha() * getAlpha());
        return b.toString();
    }
private String getSVGFillStyle() {
        StringBuilder b = new StringBuilder();
        b.append("fill: ").append(svgColorStr()).append("; ");
        b.append("fill-opacity: ").append(getColorAlpha() * getAlpha());
        return b.toString();
    }
Returns a fill style string based on the current paint and
alpha settings.

@return A fill style string.