Number value = (Number) getAttribute(AttributeKeys.STROKE_MITER_LIMIT_FACTOR);
Number value = (Number) getAttribute(AttributeKeys.STROKE_MITER_LIMIT);
    public double getStrokeMiterLimitFactor() {        Number value = (Number) getAttribute(AttributeKeys.STROKE_MITER_LIMIT_FACTOR);        return (value != null) ? value.doubleValue() : 10f;    }