As mentioned in the DocBlock $message could be an array too.

Related to https://scrutinizer-ci.com/g/phpDocumentor/phpDocumentor2/inspections/ca8dcd86-abff-422b-864f-16b0b2becb3d/issues/files/src/phpDocumentor/Console/Output/Output.php?status=existing&selectedSeverities[0]=10&orderField=path&order=asc
Merge pull request #1171 from siad007/patch-17

As mentioned in the DocBlock $message could be an array too.