PhpCsFixer\Console\Command\DescribeCommand::getSetNames PHP Method

    private function getSetNames()
    {
        if (null !== $this->setNames) {
            return $this->setNames;
        }
        $set = new RuleSet();
        $this->setNames = $set->getSetDefinitionNames();
        sort($this->setNames);
        return $this->setNames;
    }