Phpml\Dataset\Dataset::getTargets PHP Method

    public function getTargets() : array;

 /**
  * @param Dataset $dataset
  *
  * @return Dataset[]|array
  */
 private function splitByTarget(Dataset $dataset) : array
 {
     $targets = $dataset->getTargets();
     $samples = $dataset->getSamples();
     $uniqueTargets = array_unique($targets);
     $split = array_combine($uniqueTargets, array_fill(0, count($uniqueTargets), []));
     foreach ($samples as $key => $sample) {
         $split[$targets[$key]][] = $sample;
     }
     $datasets = $this->createDatasets($uniqueTargets, $split);
     return $datasets;
 }