From T181940: Remove composer dump-autoload --optimize from mw-fetch-composer-dev.sh and Quibble, it seems various hamcrest global functions are used in FileImporter
Would be worth swapping them out for their namespaced static functions equivalents
* Decorates another Matcher, retaining the behavior but allowing tests * to be slightly more expressive. * * For example: assertThat($cheese, equalTo($smelly)) * vs. assertThat($cheese, is(equalTo($smelly))) */ function is($value) { return \Hamcrest\Core\Is::is($value); }