code: protected <S extends State> S getPartitionedState(StateDescriptor<S, ?> stateDescriptor) throws Exception {
  		return getPartitionedState(VoidNamespace.INSTANCE, VoidNamespaceSerializer.INSTANCE, stateDescriptor);
  	}
docs: Creates a partitioned state handle, using the state backend configured for this task.
  
  @throws IllegalStateException Thrown, if the key/value state was already initialized.
  @throws Exception Thrown, if the state backend cannot create the key/value state.