TODO fulfillment: use enum for enumerated types.

src/python/src/_adapter/_links_test.py

src/python/src/_adapter/_lonely_rear_link_test.py

src/python/src/_adapter/fore.py

src/python/src/_framework/base/interfaces.py

src/python/src/_framework/base/interfaces_test.py

src/python/src/_framework/base/packets/_ends.py

src/python/src/_framework/base/packets/_ingestion.py

src/python/src/_framework/base/packets/_interfaces.py

src/python/src/_framework/base/packets/_termination.py

src/python/src/_framework/base/packets/_transmission.py

src/python/src/_framework/base/packets/packets.py

src/python/src/_framework/base/util.py

src/python/src/_framework/face/_calls.py

src/python/src/_framework/face/_control.py

src/python/src/_framework/face/interfaces.py

...g/event_invocation_synchronous_event_service_test_case.py