Refactoring code in src/batch.js

[Hakaabi]

I am refactoring the function 'processSortedSet' in file 'batch.js' under folder 'src'.

I added a helper function named 'processIsFunction' to deal with the cognitive complexity warning from line 17. This single helper method was able to solve all the errors concerning cognitive complexity in the code.

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[Hakaabi]

I would like to work on this please!

[github-actions]

Great! I assigned you (@Hakaabi) to the issue. Have fun working on it!

[EduardoFF]

This type of issue shouldn't be labeled as a bug. It pertains to solving a problem that affects code quality rather than functionality.