update variable names and default

[gaelforget]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 9 lines in your changes missing coverage. Please review.

Project coverage is 91.03%. Comparing base (33cc1a2) to head (2f75658).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
src/Integration.jl	50.00%	9 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #153      +/-   ##
==========================================
- Coverage   91.29%   91.03%   -0.27%     
==========================================
  Files          22       22              
  Lines        2734     2743       +9     
==========================================
+ Hits         2496     2497       +1     
- Misses        238      246       +8     

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