UnusedClass

Emitted when --find-dead-code is turned on and Psalm cannot find any uses of a given class.

If this class is genuinely part of your public API — used from outside the analysed codebase (for example a library entry point, or a class instantiated only by a framework or plugin loader) — annotate it with @api (or @psalm-api); use this only for real public surface. Otherwise the class is dead code and should be removed.

See @api for the full guidance; note that @psalm-suppress is not a substitute for @api, as it silences the report without marking the class as used.

<?php

final class A {}
final class B {}
$a = new A();