https://beam.apache.org/releases/javadoc/2.70.0/org/apache/beam/sdk/transforms/Reshuffle.AssignShardFn.html
Reshuffle.AssignShardFn (Apache Beam 2.70.0)
declaration: package: org.apache.beam.sdk.transforms, class: Reshuffle, class: AssignShardFn
apache beamreshuffle