silverstripe / silverstripe-fulltextsearch

src/Solr/Services/Solr4Service.php

<?php

namespace SilverStripe\FullTextSearch\Solr\Services;

class Solr4Service extends SolrService
{
    private static $core_class = Solr4Service_Core::class;

The private property $core_class is not used, and could be removed.

}