isMatching example

    }

    public function getMatchingItems(
        LineItemGroupDefinition $groupDefinition,
        LineItemFlatCollection $items,
        SalesChannelContext $context
    ): LineItemFlatCollection {
        $matchingItems = [];

        foreach ($items as $item) {
            if ($this->anyRuleProvider->isMatching($groupDefinition, $item, $context)) {
                $matchingItems[] = $item;
            }
        }

        return new LineItemFlatCollection($matchingItems);
    }
}

if ($withRules === true) {
            $matchId = $diffrentId === true ? Uuid::randomHex() : $lineItem->getId();

            $ruleCollection->add($this->buildRuleEntity(
                $this->getProductsRule([$matchId])
            ));
        }

        $group = new LineItemGroupDefinition('test', 'COUNT', 1, 'PRICE_ASC', $ruleCollection);

        static::assertEquals($expected, $this->matcher->isMatching($group, $lineItem, $this->context));
    }

    /** * @return iterable<string, array<bool>> */
    public static function lineItemProvider(): iterable
    {
        yield 'Matching line item not in group with rules' => [true, true, false];
        yield 'Matching line item not in group without rules' => [false, false, true];
        yield 'Matching line item in group with rules' => [true, false, true];
    }