enhance bitSwap

[kunwarbhattal]

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized it.
• All filenames are in PascalCase.
• All functions and variable names follow Java naming conventions.
• All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
• All new code is formatted with clang-format -i --style=file path/to/your/file.java

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.25%. Comparing base (5e9d9f7) to head (0449c4b).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6557      +/-   ##
============================================
+ Coverage     75.23%   75.25%   +0.01%     
- Complexity     5626     5629       +3     
============================================
  Files           691      691              
  Lines         19448    19450       +2     
  Branches       3758     3760       +2     
============================================
+ Hits          14632    14637       +5     
+ Misses         4248     4247       -1     
+ Partials        568      566       -2     

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