Apply fixes from StyleCI

[mechelon]

This pull request applies code style fixes from an analysis carried out by StyleCI.

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[what-the-diff]

PR Summary

• Remove dependency on Entity class
  Removed the use of the Entity class, simplifying the code and potentially improving performance.
• Add test for collection's first item
  Implemented a test to ensure the first item in a collection is of type string and has the value 'test 1', increasing confidence in the correctness of the code.