Creates a new topic handle for topic named \p topic_str
the topic name
Store offset \p offset for topic partition \p partition. The offset will be committed (written) to the offset store according to \p auto.commit.interval.ms.
true if \p partition is available for the topic (has leader). Warning: \b MUST \b ONLY be called from within a PartitionerCb callback.
Unassigned partition.
Topic handle