public function validate() : bool
    {
        $table = $this->getConfig()->getTable();
        foreach ([$this->config->getField(), $this->config->getDisplayField()] as $field) {
            if ($table->getSchema()->hasColumn($field)) {
                continue;
            }

            $this->errors[] = sprintf('Unknown column "%s" for table "%s"', $field, $table->getAlias());
        }

        return empty($this->errors);
    }