https://beam.apache.org/releases/javadoc/current/org/apache/beam/runners/spark/stateful/StateSpecFunctions.html
StateSpecFunctions (Apache Beam 2.73.0)
declaration: package: org.apache.beam.runners.spark.stateful, class: StateSpecFunctions
apache beam
https://beam.apache.org/releases/javadoc/2.22.0/org/apache/beam/runners/spark/stateful/StateSpecFunctions.html
StateSpecFunctions (Apache Beam 2.22.0)
apache beam