#### Purpose (TL;DR) - mandatory
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> give a concise (one or two short sentences) description of what what problem is being solved by this PR
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> Example: Fix issue #123456 by re-structuring the colour selection conditional in method `paintBlue`
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#### Background (Problem in detail)  - optional
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> When relevant, give a more thorough description of what the problem the PR is trying to solve. Examples of good topics for this section are:
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#### Solution  - optional
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#### How to verify - mandatory
1. Check out this branch
2. `npm install`
3. <your-steps-here>

#### Checklist for author

- [ ] `npm run lint` passes
- [ ] References to standard library functions are [cached](https://github.com/sinonjs/sinon/pull/1523).
