Use beam, rather than typing, list type hint.
Use beam, rather than typing, list type hint.

This allows nesting of non-typing types.

chamikaramj/beam,chamikaramj/beam,apache/beam,lukecwik/incubator-beam,chamikaramj/beam,lukecwik/incubator-beam,lukecwik/incubator-beam,chamikaramj/beam,robertwb/incubator-beam,lukecwik/incubator-beam,apache/beam,lukecwik/incubator-beam,lukecwik/incubator-beam,chamikaramj/beam,robertwb/incubator-beam,chamikaramj/beam,chamikaramj/beam,lukecwik/incubator-beam,lukecwik/incubator-beam,chamikaramj/beam,apache/beam,robertwb/incubator-beam,apache/beam,apache/beam,apache/beam,lukecwik/incubator-beam,chamikaramj/beam,apache/beam,robertwb/incubator-beam,apache/beam,apache/beam,chamikaramj/beam,robertwb/incubator-beam,lukecwik/incubator-beam,robertwb/incubator-beam,robertwb/incubator-beam,robertwb/incubator-beam,robertwb/incubator-beam,robertwb/incubator-beam,apache/beam,apache/beam