documentation/_upgrade_schema_interface_8php_source.html

 <?php
 namespace Magento\Framework\Setup;

 interface UpgradeSchemaInterface
 {
     public function upgrade(SchemaSetupInterface $setup, ModuleContextInterface $context);
 }
Magento\Framework\Setup\ModuleContextInterface
Definition: ModuleContextInterface.php:13

Magento\Framework\Setup\UpgradeSchemaInterface\upgrade
upgrade(SchemaSetupInterface $setup, ModuleContextInterface $context)

Magento\Framework\Setup\SchemaSetupInterface
Definition: SchemaSetupInterface.php:13

Magento\Framework\Setup
Definition: BackendFrontnameGenerator.php:7

Magento\Framework\Setup\UpgradeSchemaInterface
Definition: UpgradeSchemaInterface.php:14

$setup
$setup
Definition: trigger.php:12