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psalm/docs/running_psalm/issues/UnusedMethod.md

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# UnusedMethod
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Emitted when `--find-dead-code` is turned on and Psalm cannot find any uses of a
given private method or function.
If this method is used and part of the public API, annotate the containing class
with `@psalm-api`.
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```php
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<?php
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class A {
public function __construct() {
$this->foo();
}
private function foo() : void {}
private function bar() : void {}
}
$a = new A();
```