private function _addExclusionStrategy(ExclusionStrategyInterface $strategy): void
    {
        if (null === $this->exclusionStrategy) {
            $this->exclusionStrategy = $strategy;

            return;
        }

        if ($this->exclusionStrategy instanceof DisjunctExclusionStrategy) {
            $this->exclusionStrategy->addStrategy($strategy);

            return;
        }

        $this->exclusionStrategy = new DisjunctExclusionStrategy([
            $this->exclusionStrategy,
            $strategy,
        ]);
    }