Fatal error: Uncaught Error: Interface "Wikibase\DataModel\Services\Lookup\PropertyDataTypeLookup" not found in /home/hiphopdi/public_html/wiki2/extensions/Math/tests/phpunit/DummyPropertyDataTypeLookup.php:5 Stack trace: #0 {main} thrown in /home/hiphopdi/public_html/wiki2/extensions/Math/tests/phpunit/DummyPropertyDataTypeLookup.php on line 5