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psalm/docs/running_psalm/issues/UnusedDocblockParam.md

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# UnusedDocblockParam
Emitted when `--find-dead-code` is turned on and a parameter specified in docblock does not have a corresponding parameter in function / method signature.
```php
<?php
/**
* @param string $legacy_param was renamed to $newParam
*/
function f(string $newParam): string {
return strtolower($newParam);
}
```