added JsDoc example to fetchValues function

[Nkiriobasi]

added documentation using JsDoc

[iuioiua]

Thank you for the PR @Nkiriobasi! JSDocs and comments aim to add missing context from the implementation. So, a few notes:

• Adding line-by-line comments doesn't add context, as the reader can just read the code with the same level of understanding.
• As stated in the issue, each function should have an @example snippet.
• A @param directive isn't required if an argument is simple enough.

With these specific functions, for example, you probably just want a simple description as the first line, then an @example snippet. Check this out as a good example.

Also, please be sure deno task ok passes before committing.

Please let me know if you need anything.

[Nkiriobasi]

Alright, no problem. I'll refactor.

[Nkiriobasi]

Please I'm using one PR with different commit indicating different files. it was not intentional.

[iuioiua]

Please run deno fmt

[iuioiua]

Hi @Nkiriobasi, I'll close this PR without merging as I created #533, which superseded this one. I copied some bits from this PR to that one. Please feel free to take a look to get a feel for the style I'm hoping for. Either way, thank you.