Pipeline options must be available Context in DoFn.startBundle

Our (not yet merged) Java Pubsub implementation has code like this in a DoFn:

@Override
public void startBundle(Context c) throws Exception

{ Preconditions.checkState(pubsubClient == null); pubsubClient = PubsubClient.newClient(transportType, timestampLabel, idLabel, c.getPipelineOptions().as(PubsubOptions.class)); super.startBundle(c); }

This fails with NPE since the pipeline options are not conveyed via the context.