ConfigurationStruct example

$configuration = $this->getTableConfiguration($table);

        $items = [];
        foreach ($columns as $column) {
            $name = strtolower($column->getName());
            $default = $column->getDefault();

            if ($default === 'NULL') {
                $default = null;
            }

            $item = new ConfigurationStruct();
            $item->setTableName($table);
            $item->setColumnName($column->getName());
            $item->setIdentifier($this->tableMapping->isIdentifierColumn($table, $column->getName()));
            $item->setCore($this->tableMapping->isCoreColumn($table, $column->getName()));
            $item->setColumnType($this->typeMapping->dbalToUnified($column->getType()));
            $item->setElasticSearchType($this->typeMapping->unifiedToElasticSearch($item->getColumnType()));
            $item->setDefaultValue($default);

            if (isset($configuration[$name])) {
                $config = $configuration[$name];
                $item->setId((int) $config['id']);