code: private function createStatement(): void
      {
          if (null !== $this->statement) {
              return;
          }
  
          if (null === $this->container || !$this->container->has($this->dbalServiceName)) {
              throw new \RuntimeException('The container has not been injected or the database service is missing');
          }
  
          /** @var Connection $connection */
          $connection = $this->container->get($this->dbalServiceName);
  
          $this->statement = $connection->prepare('
              INSERT INTO
                  tl_log
                      (tstamp, source, action, username, text, func, browser)
                  VALUES
                      (:tstamp, :source, :action, :username, :text, :func, :browser)
          ');
      }
docs: Verifies the database connection and prepares the statement.
  
  @throws \RuntimeException