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psalm/docs/running_psalm/issues/UnnecessaryVarAnnotation.md

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# UnnecessaryVarAnnotation
Emitted when `--find-dead-code` is turned on and you're using a `@var` annotation on an assignment that Psalm has already identified a type for.
```php
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<?php
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function foo() : string {
return "hello";
}
/** @var string */
$a = foo();
```