@phpstan-allow-private-mutation

The @phpstan-allow-private-mutation tag allows a private-scope mutation of an otherwise immutable property, defined by PHPStan.

Parsing a @phpstan-allow-private-mutation tag produces a AllowPrivateMutationTag instance. Being a pure marker, it adds nothing beyond the $name and optional $description every Tag already carries.

The same AllowPrivateMutationTag is produced by @psalm-allow-private-mutation, which restate the same concept for their respective tools.

Originates from PHPStan's own annotation vocabulary.