add mounter helper

[acoshift]

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[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.

Project coverage is 64.11%. Comparing base (7b43611) to head (b421639).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
arpc.go	0.00%	4 Missing ⚠️
mounter.go	0.00%	2 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master       #5      +/-   ##
==========================================
- Coverage   71.00%   64.11%   -6.90%     
==========================================
  Files           3        5       +2     
  Lines         269      326      +57     
==========================================
+ Hits          191      209      +18     
- Misses         68      105      +37     
- Partials       10       12       +2     

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