add getFLow in CompressorChart

[EvenSol]

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 5.88235% with 16 lines in your changes are missing coverage. Please review.

Project coverage is 34.74%. Comparing base (bbbc4c1) to head (44b870e).

Files	Patch %	Lines
...ompressor/CompressorChartAlternativeMapLookup.java	0.00%	16 Missing :warning:

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #971      +/-   ##
============================================
+ Coverage     34.71%   34.74%   +0.02%     
- Complexity     5292     5302      +10     
============================================
  Files           700      700              
  Lines         69557    69573      +16     
  Branches       7998     7999       +1     
============================================
+ Hits          24148    24171      +23     
+ Misses        43922    43918       -4     
+ Partials       1487     1484       -3     

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