code: public function getMigrations(int $steps): array
      {
          $sql = "select migration from {$this->table} 
                  where batch >= 1 
                  order by batch, migration desc
                  limit ?";
  
          $stmt = $this->pdo->prepare($sql);
          $stmt->bindParam(1, $steps, PDO::PARAM_INT);
          $stmt->execute();
  
          return $stmt->fetchAll(PDO::FETCH_COLUMN);
      }
docs: Get list of migrations.
  
  @param  int $steps
  @return array