$groups * * @return Type\TypeInterface> * * @psalm-suppress MixedReturnTypeCoercion - Psalm loses track of the keys. No worries, another psalm plugin fixes this! */ function capture_groups(array $groups): Type\TypeInterface { return Type\shape( Dict\from_keys( Dict\unique([0, ...$groups]), /** * @return Type\TypeInterface */ static fn(): Type\TypeInterface => Type\string() ) ); }