So, how can we solve this? One way is to explicitly pass the inner serializer provider as a type parameter directly to SerializeIterator. We will call this pattern higher-order providers, because SerializeIterator now has a generic parameter specifically for the item serializer. With this in place, our SerializeIterator implementation can now require that SerializeItem also implements SerializeImpl, using the iterator's Item as the value type.
「暗涌」：贵司团队配置非常跨界——清华学术背景、智元与镁伽的量产经验，这种组合如何转化为竞争优势？
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