def register(self, work_type, queue):
        self.pending.register(work_type, queue)
Test handling TDS 5's new vlen and asking for indices
dataset/ETHPy150Open bslatkin/dpxdt/dpxdt/client/workers.py/WorkflowThread.register--crossover with--dataset/ETHPy150Open Unidata/siphon/siphon/cdmr/tests/test_dataset.py/test_tds5_vlen_slicing