chore: updates Collections namespace

[clairekuang]

Description & motivation

Changes:

To-do before merge:

Screenshots:

Validation of changes:

Checklist:

• My pull request follows the guidelines in the Contributing guide?
• My pull request does not duplicate any other open Pull Requests for the same update/change?
• My commits are related to the pull request and do not amend unrelated code or documentation.
• My code follows a similar style to existing code.
• I have added appropriate tests.
• I have updated or added relevant documentation.

References

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 5.74%. Comparing base (6fba41d) to head (f5539dc).

Additional details and impacted files

@@          Coverage Diff          @@
##             dev     #39   +/-   ##
=====================================
  Coverage   5.74%   5.74%           
=====================================
  Files        168     168           
  Lines       3448    3448           
  Branches     423     423           
=====================================
  Hits         198     198           
  Misses      3247    3247           
  Partials       3       3           

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