protected function prepareRecord($record)
    {
        if ($record[static::REMOVE_FLAG_NAME] == 1) {
            return $record;
        }

        $prepared = [];

        /* @var Field $field */
        foreach ($this->fields as $field) {
            $columns = $field->column();

            $value = $this->fetchColumnValue($record, $columns);

            if (is_null($value)) {
                continue;
            }

            if (method_exists($field, 'prepare')) {
                $value = $field->prepare($value);
            }

            if (($field instanceof \Encore\Admin\Form\Field\Hidden) || $value != $field->original()) {
                if (is_array($columns)) {
                    foreach ($columns as $name => $column) {
                        Arr::set($prepared, $column, $value[$name]);
                    }
                } elseif (is_string($columns)) {
                    Arr::set($prepared, $columns, $value);
                }
            }
        }

        $prepared[static::REMOVE_FLAG_NAME] = $record[static::REMOVE_FLAG_NAME];

        return $prepared;
    }