revert index method signature

[binaryk]

Fixed

• revert index method signature

[what-the-diff]

PR Summary

• Updated Filtering Logic in MatchesCollection
  The method used for sorting and selecting data in the MatchesCollection file has been updated to make it more efficient and safer.

• Simplified Method in Repository
  An unnecessary parameter was removed from a method in the Repository file, which resulted in a more streamlined process. The change also allowed us to simplify the return logic, making the code easier to maintain and understand.