public function down(Schema $schema)
{
$this->abortIf($this->connection->getDatabasePlatform()->getName() != "postgresql");
$this->addSql("ALTER TABLE typo3_neos_domain_model_site DROP CONSTRAINT FK_1854B2075CEB2C15");
$this->addSql("DROP INDEX IDX_1854B2075CEB2C15");
$this->addSql("ALTER TABLE typo3_neos_domain_model_site DROP assetcollection");
}