Function defineMigration

defineMigration<T extends Migration<MigrateDefinition>>(migration: T): T
Helper function for defining a Sanity content migration. This function does not do anything on its own; it exists to check that your schema definition is correct, and help autocompletion in your IDE.

https://www.sanity.io/docs/schema-and-content-migrations#af2be129ccd6
Type Parameters
- T extends Migration<MigrateDefinition>
Parameters
- migration: T
  The migration definition
  
  See Migration
Returns T
Example: Basic usage
```
export default defineMigration({
 title: 'Make sure all strings with “acme” is uppercased to “ACME”',
 migrate: {
   string(node, path, context) {
     if (node === "acme") {
       return set(node.toUpperCase())
     }
   },
 },
})
```
- Defined in migrate/src/defineMigration.ts:29