Refactoring

[asolntsev]

fix IDEA warnings, apply its automatic suggestions.

[what-the-diff]

PR Summary

• File Separator Handling Improvement
  In the File.java, an import was added that allows better handling of file separators which accommodates varying systems.

• Enhancements in FakeValuesGrouping.java
  The class was altered to be strictly 'public'. This means it can be accessed universally. There are also two new ways to create 'FakeValuesGrouping' with varying parameters.

• Warning Removal in Range.java
  A warning was removed in Range.java, this improves the clarity and quality of the code.

• Improvement in CommerceTest.java
  The price assertions are now using a standard decimal format. This eliminates errors that could occur due to locale-specific decimal separators.

• Better Encapsulation In Various Tests
  In several testing files, field declarations were secured from outside access by declaring them 'private final'. This change helps in maintaining the integrity of the data used for testing.

• Better Safety and Clarity in ProviderGenerator.java
  Risk of null pointer exceptions has been mitigated by adding safety checks. Type parameters were also better defined for a clearer understanding and increased type safety.

• Test Setup Simplification
  In both FakeValuesGroupingTest.java and FakeValuesTest.java, testing setup has been simplified. This was accomplished by initializing necessary values directly, removing the need for unnecessary setup code, and improving clarity and performance.

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.44%. Comparing base (cee4f6d) to head (f10f225).
⚠️ Report is 238 commits behind head on main.
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Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1569      +/-   ##
============================================
+ Coverage     92.42%   92.44%   +0.01%     
- Complexity     3328     3329       +1     
============================================
  Files           330      330              
  Lines          6550     6554       +4     
  Branches        643      643              
============================================
+ Hits           6054     6059       +5     
  Misses          340      340              
+ Partials        156      155       -1     

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