Avoid shadowing important built-ins

[rafrafek]

What type of PR is this? cleanup(?)

What this PR does / why we need it:

Fixes a lot of potential issues when someone tries to use the code from the example.

Which issue(s) this PR fixes:

Special notes for your reviewer:

Does this PR introduce a user-facing change? NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[k8s-ci-robot]

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[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: rafrafek / name: Rafał (f6c65df)

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: rafrafek
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[roycaihw]

Please sign the CLA

[rafrafek]

@roycaihw done!

[k8s-triage-robot]

The Kubernetes project currently lacks enough contributors to adequately respond to all PRs.

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• After 90d of inactivity, lifecycle/stale is applied
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/lifecycle stale

[rafrafek]

Bump.

/remove-lifecycle stale