class ResultRow

class ResultRow {
    
    /**
     * The entity for this result.
     *
     * @var \Drupal\Core\Entity\EntityInterface
     */
    public $_entity = NULL;
    
    /**
     * An array of relationship entities.
     *
     * @var \Drupal\Core\Entity\EntityInterface[]
     */
    public $_relationship_entities = [];
    
    /**
     * An incremental number which represents the row in the entire result.
     *
     * @var int
     */
    public $index;
    
    /**
     * Constructs a ResultRow object.
     *
     * @param array $values
     *   (optional) An array of values to add as properties on the object.
     */
    public function __construct(array $values = []) {
        foreach ($values as $key => $value) {
            $this->{$key} = $value;
        }
    }
    
    /**
     * Resets the _entity and _relationship_entities properties.
     */
    public function resetEntityData() {
        $this->_entity = NULL;
        $this->_relationship_entities = [];
    }

}