Only parsing protobuf entity key if field is set.

Source-Link: https://togithub.com/googleapis/synthtool/commit/26c7505b2f76981ec1707b851e1595c8c06e90fc
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:f946c75373c2b0040e8e318c5e85d0cf46bc6e61d0a01f3ef94d8de974ac6790

…617)

Source-Link: googleapis/synthtool@95d9289
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:c8878270182edaab99f2927969d4f700c3af265accd472c3425deedff2b7fd93

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

This allows one to more easily cancel or get updated metadata for an
existing job from the client class. Ensures that project ID and location
are correctly populated.

Thank you for opening a Pull Request! Before submitting your PR, there are a few things you can do to make sure it goes smoothly:
- [ ] Make sure to open an issue as a [bug/issue](https://github.com/googleapis/python-bigquery/issues/new/choose) before writing your code!  That way we can discuss the change, evaluate designs, and agree on the general idea
- [ ] Ensure the tests and linter pass
- [ ] Code coverage does not decrease (if any source code was changed)
- [ ] Appropriate docs were updated (if necessary)

Fixes #616 🦕

🤖 I have created a release \*beep\* \*boop\*
---
## [2.14.0](https://www.github.com/googleapis/python-bigquery/compare/v2.13.1...v2.14.0) (2021-04-26)


### Features

* accept DatasetListItem where DatasetReference is accepted ([#597](https://www.github.com/googleapis/python-bigquery/issues/597)) ([c8b5581](https://www.github.com/googleapis/python-bigquery/commit/c8b5581ea3c94005d69755c4a3b5a0d8900f3fe2))
* accept job object as argument to `get_job` and `cancel_job` ([#617](https://www.github.com/googleapis/python-bigquery/issues/617)) ([f75dcdf](https://www.github.com/googleapis/python-bigquery/commit/f75dcdf3943b87daba60011c9a3b42e34ff81910))
* add `Client.delete_job_metadata` method to remove job metadata ([#610](https://www.github.com/googleapis/python-bigquery/issues/610)) ([0abb566](https://www.github.com/googleapis/python-bigquery/commit/0abb56669c097c59fbffce007c702e7a55f2d9c1))
* add `max_queue_size` argument to `RowIterator.to_dataframe_iterable` ([#575](https://www.github.com/googleapis/python-bigquery/issues/575)) ([f95f415](https://www.github.com/googleapis/python-bigquery/commit/f95f415d3441b3928f6cc705cb8a75603d790fd6))
* add type hints for public methods ([#613](https://www.github.com/googleapis/python-bigquery/issues/613)) ([f8d4aaa](https://www.github.com/googleapis/python-bigquery/commit/f8d4aaa335a0eef915e73596fc9b43b11d11be9f))
* DB API cursors are now iterable ([#618](https://www.github.com/googleapis/python-bigquery/issues/618)) ([e0b373d](https://www.github.com/googleapis/python-bigquery/commit/e0b373d0e721a70656ed8faceb7f5c70f642d144))
* retry google.auth TransportError by default ([#624](https://www.github.com/googleapis/python-bigquery/issues/624)) ([34ecc3f](https://www.github.com/googleapis/python-bigquery/commit/34ecc3f1ca0ff073330c0c605673d89b43af7ed9))
* use pyarrow stream compression, if available ([#593](https://www.github.com/googleapis/python-bigquery/issues/593)) ([dde9dc5](https://www.github.com/googleapis/python-bigquery/commit/dde9dc5114c2311fb76fafc5b222fff561e8abf1))


### Bug Fixes

* consistent percents handling in DB API query ([#619](https://www.github.com/googleapis/python-bigquery/issues/619)) ([6502a60](https://www.github.com/googleapis/python-bigquery/commit/6502a602337ae562652a20b20270949f2c9d5073))
* missing license headers in new test files ([#604](https://www.github.com/googleapis/python-bigquery/issues/604)) ([df48cc5](https://www.github.com/googleapis/python-bigquery/commit/df48cc5a0be99ad39d5835652d1b7422209afc5d))
* unsetting clustering fileds on Table is now possible ([#622](https://www.github.com/googleapis/python-bigquery/issues/622)) ([33a871f](https://www.github.com/googleapis/python-bigquery/commit/33a871f06329f9bf5a6a92fab9ead65bf2bee75d))


### Documentation

* add sample to run DML query ([#591](https://www.github.com/googleapis/python-bigquery/issues/591)) ([ff2ec3a](https://www.github.com/googleapis/python-bigquery/commit/ff2ec3abe418a443cd07751c08e654f94e8b3155))
* update the description of the return value of `_QueryResults.rows()` ([#594](https://www.github.com/googleapis/python-bigquery/issues/594)) ([8f4c0b8](https://www.github.com/googleapis/python-bigquery/commit/8f4c0b84dac3840532d7865247b8ad94b625b897))
---


This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).

…e is not set (#617)

* fix: topic name is required to create a notification. add check and tests

* revise conf tests

* fix topic formatting and remove extra validation

* blacken lint

* update docstrings

🤖 I have created a release \*beep\* \*boop\*
---
## [1.43.0](https://www.github.com/googleapis/python-storage/compare/v1.42.3...v1.43.0) (2021-11-15)


### Features

* add ignore_flush parameter to BlobWriter ([#644](https://www.github.com/googleapis/python-storage/issues/644)) ([af9c9dc](https://www.github.com/googleapis/python-storage/commit/af9c9dc83d8582167b74105167af17c9809455de))
* add support for Python 3.10 ([#615](https://www.github.com/googleapis/python-storage/issues/615)) ([f81a2d0](https://www.github.com/googleapis/python-storage/commit/f81a2d054616c1ca1734997a16a8f47f98ab346b))


### Bug Fixes

* raise a ValueError in BucketNotification.create() if a topic name is not set ([#617](https://www.github.com/googleapis/python-storage/issues/617)) ([9dd78df](https://www.github.com/googleapis/python-storage/commit/9dd78df444d21af51af7858e8958b505a26c0b79))


### Documentation

* add contributing and authoring guides under samples/ ([#633](https://www.github.com/googleapis/python-storage/issues/633)) ([420591a](https://www.github.com/googleapis/python-storage/commit/420591a2b71f823dbe80f4a4405d8a514f87e0fb))
* add links to samples and how to guides ([#641](https://www.github.com/googleapis/python-storage/issues/641)) ([49f78b0](https://www.github.com/googleapis/python-storage/commit/49f78b09fed6d9f486639fd0a72542c30a0df084))
* add README to samples subdirectory ([#639](https://www.github.com/googleapis/python-storage/issues/639)) ([58af882](https://www.github.com/googleapis/python-storage/commit/58af882c047c31f59486513c568737082bca6350))
* update samples readme with cli args ([#651](https://www.github.com/googleapis/python-storage/issues/651)) ([75dda81](https://www.github.com/googleapis/python-storage/commit/75dda810e808074d18dfe7915f1403ad01bf2f02))
---


This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).