public function down(Schema $schema)
{
$this->abortIf($this->connection->getDatabasePlatform()->getName() != "mysql");
$this->addSql("ALTER TABLE typo3_typo3cr_domain_model_nodedata CHANGE dimensionvalues dimensionvalues LONGTEXT NOT NULL COMMENT '(DC2Type:json_array)', CHANGE accessroles accessroles LONGTEXT NOT NULL COMMENT '(DC2Type:json_array)'");
}