Datalabeling: Fix coverage in 'types.py' (via synth).

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Here's the log from Synthtool:

synthtool > Executing /tmpfs/src/git/autosynth/working_repo/datalabeling/synth.py.
synthtool > Ensuring dependencies.
synthtool > Pulling artman image.
latest: Pulling from googleapis/artman
Digest: sha256:28d4271586772b275cd3bc95cb46bd227a24d3c9048de45dccdb7f3afb0bfba9
Status: Image is up to date for googleapis/artman:latest
synthtool > Cloning googleapis.
synthtool > Running generator for google/cloud/datalabeling/artman_datalabeling_v1beta1.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/datalabeling-v1beta1.
synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/cloud/datalabeling/v1beta1/operations.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/datalabeling-v1beta1/google/cloud/datalabeling_v1beta1/proto/operations.proto
synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/cloud/datalabeling/v1beta1/data_labeling_service.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/datalabeling-v1beta1/google/cloud/datalabeling_v1beta1/proto/data_labeling_service.proto
synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/cloud/datalabeling/v1beta1/dataset.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/datalabeling-v1beta1/google/cloud/datalabeling_v1beta1/proto/dataset.proto
synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/cloud/datalabeling/v1beta1/annotation.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/datalabeling-v1beta1/google/cloud/datalabeling_v1beta1/proto/annotation.proto
synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/cloud/datalabeling/v1beta1/human_annotation_config.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/datalabeling-v1beta1/google/cloud/datalabeling_v1beta1/proto/human_annotation_config.proto
synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/cloud/datalabeling/v1beta1/instruction.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/datalabeling-v1beta1/google/cloud/datalabeling_v1beta1/proto/instruction.proto
synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/cloud/datalabeling/v1beta1/annotation_spec_set.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/datalabeling-v1beta1/google/cloud/datalabeling_v1beta1/proto/annotation_spec_set.proto
synthtool > Placed proto files into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/datalabeling-v1beta1/google/cloud/datalabeling_v1beta1/proto.
synthtool > Replaced 'operations_pb2.ImportDataOperationResponse' in google/cloud/datalabeling_v1beta1/gapic/data_labeling_service_client.py.
synthtool > Replaced 'operations_pb2.ImportDataOperationMetadata' in google/cloud/datalabeling_v1beta1/gapic/data_labeling_service_client.py.
synthtool > Replaced 'operations_pb2.Operation\\(' in tests/unit/gapic/v1beta1/test_data_labeling_service_client_v1beta1.py.
.coveragerc
.flake8
MANIFEST.in
noxfile.py.j2
setup.cfg
Running session blacken
Creating virtualenv using python3.6 in /tmpfs/src/git/autosynth/working_repo/datalabeling/.nox/blacken
pip install black
black docs google tests noxfile.py setup.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/__init__.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/__init__.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/gapic/enums.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/gapic/data_labeling_service_client_config.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/annotation_pb2_grpc.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/gapic/transports/data_labeling_service_grpc_transport.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/annotation_spec_set_pb2_grpc.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/annotation_spec_set_pb2.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/data_labeling_service_pb2_grpc.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/gapic/data_labeling_service_client.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/dataset_pb2_grpc.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/human_annotation_config_pb2.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/human_annotation_config_pb2_grpc.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/annotation_pb2.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/instruction_pb2_grpc.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/instruction_pb2.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/operations_pb2_grpc.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/types.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/dataset_pb2.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/noxfile.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/operations_pb2.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/google/cloud/datalabeling_v1beta1/proto/data_labeling_service_pb2.py
reformatted /tmpfs/src/git/autosynth/working_repo/datalabeling/tests/unit/gapic/v1beta1/test_data_labeling_service_client_v1beta1.py
All done! ✨ 🍰 ✨
24 files reformatted, 6 files left unchanged.
Session blacken was successful.
synthtool > Cleaned up 2 temporary directories.
synthtool > Wrote metadata to synth.metadata.