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Magento Coding Standard

FILE: ...om/storage/app/swissup/module-subscription/Setup/InstallSchema.php
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FOUND 1 ERROR AFFECTING 1 LINE
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 1 | ERROR | InstallSchema scripts are obsolete. Please use declarative schema
   |       | approach in module's etc/db_schema.xml file
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Time: 1.91 secs; Memory: 20MB