oap-server/server-tools/data-generator/src/main/java/org/apache/skywalking/generator/IntGenerator.java [48:57]:
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    public Long next(Object ignored) {
        if (!limitedDomain) {
            return next0();
        }
        return domain
            .stream()
            .skip(random.nextInt(domain.size()))
            .findFirst()
            .orElseThrow(() -> new RuntimeException("Should never happen"));
    }
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oap-server/server-tools/data-generator/src/main/java/org/apache/skywalking/generator/SequenceGenerator.java [55:64]:
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    public Long next(Object ignored) {
        if (!limitedDomain) {
            return next0();
        }
        return domain
            .stream()
            .skip(random.nextInt(domain.size()))
            .findFirst()
            .orElseThrow(() -> new RuntimeException("Should never happen"));
    }
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