HorizontalStackedBarGraph example code throws an error

[miguel-porto]

Hi,
The example code here
https://www.goat1000.com/svggraph-source/horizontal2

throws the error:
Fatal error: Goat1000\SVGGraph\HorizontalBarGraph has colliding constructor definitions coming from traits in /var/www/html/SVGGraph-3.20.1/HorizontalBarGraph.php on line 27

PHP version: 5.5.9-1ubuntu4.29

[goat1000]

I don't think there is an easy fix for this, apart from upgrading the version of PHP you are using or using a version of SVGGraph from when PHP5.5 was still well supported.