Struct MockProducerOptions 

#[non_exhaustive]
pub struct MockProducerOptions<K, V> { /* private fields */ }

Parameters for MockProducer::with_options.

This struct has no Java counterpart (DoD #7). It exists solely to satisfy CLAUDE.md §2’s cap on derived overload names: Java’s widest MockProducer(Cluster, boolean, Partitioner, Serializer, Serializer) constructor (MockProducer.java:113) differs from the group’s parameter-name intersection — which is EMPTY, since the no-arg :149 is in the group — by five parameters, so the cap fires and this struct becomes the method’s only parameter, carrying every Java parameter.

It deliberately has no Default. auto_complete is what both parameter-taking Java constructors (:113, :137) take from their caller, so it has no Java-derived default; the no-arg :149, which does default it to false, is translated as Default for MockProducer instead. Construct it with MockProducerOptionsBuilder::new and set it: MockProducerOptionsBuilder::build returns an error if auto_complete was not set.