Issue #3047328 follow-up by mondrake, alexpott: Allow logging for non-strings values

   * {@inheritdoc}

   */

  public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {

    $is_object = is_object($value);

    if (is_null($value) || is_bool($value)) {

      $export = var_export($value, TRUE);

    }

    elseif (is_float($value)) {

      $export = sprintf('%f', $value);

    }

    elseif (method_exists($value, 'toString')) {

    elseif ($is_object && method_exists($value, 'toString')) {

      $export = print_r($value->toString(), TRUE);

    }

    elseif (method_exists($value, 'toArray')) {

    elseif ($is_object && method_exists($value, 'toArray')) {

      $export = print_r($value->toArray(), TRUE);

    }

    elseif (is_string($value) || is_numeric($value) || is_array($value)) {

      $export = print_r($value, TRUE);

    }

    elseif (method_exists($value, '__toString')) {

    elseif ($is_object && method_exists($value, '__toString')) {

      $export = print_r((string) $value, TRUE);

    }

    else {

      $export = NULL;

    }

    $class_name = $export !== NULL && is_object($value)

    $class_name = $export !== NULL && $is_object

      ? $class_name = get_class($value) . ":\n"

      : '';