PhpCsFixer\RuleSet::getSetDefinitionNames PHP Method

    public function getSetDefinitionNames()
    {
        return array_keys($this->setDefinitions);
    }

 /**
  * @return string[]
  */
 private function getSetNames()
 {
     if (null !== $this->setNames) {
         return $this->setNames;
     }
     $set = new RuleSet();
     $this->setNames = $set->getSetDefinitionNames();
     sort($this->setNames);
     return $this->setNames;
 }