https://beam.apache.org/releases/javadoc/2.71.0/org/apache/beam/runners/fnexecution/state/StateRequestHandlers.SideInputHandler.html
StateRequestHandlers.SideInputHandler (Apache Beam 2.71.0)
declaration: package: org.apache.beam.runners.fnexecution.state, class: StateRequestHandlers, interface: SideInputHandler
apache beam