RainLab\Builder\Classes\TableMigrationCodeGenerator::indexHasAutoincrementColumns PHP Method

    protected function indexHasAutoincrementColumns($index, $table)
    {
        $indexColumns = $index->getColumns();
        foreach ($indexColumns as $indexColumn) {
            if (!$table->hasColumn($indexColumn)) {
                continue;
            }
            $tableColumn = $table->getColumn($indexColumn);
            if ($tableColumn->getAutoincrement()) {
                return true;
            }
        }
        return false;
    }