fix: better encapsulate internals

[sergiud]

No description provided.

[codecov-commenter]

Codecov Report

Attention: 7 lines in your changes are missing coverage. Please review.

Comparison is base (2b5a53c) 60.03% compared to head (f7887f9) 59.12%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1055      +/-   ##
==========================================
- Coverage   60.03%   59.12%   -0.91%     
==========================================
  Files          19       19              
  Lines        2580     2574       -6     
  Branches      911      911              
==========================================
- Hits         1549     1522      -27     
- Misses        692      706      +14     
- Partials      339      346       +7     

Files	Coverage Δ
src/demangle.cc	50.00% <ø> (ø)
src/raw_logging.cc	93.44% <100.00%> (ø)
src/stacktrace_generic-inl.h	57.14% <ø> (ø)
src/stacktrace_libunwind-inl.h	70.00% <ø> (ø)
src/stacktrace_windows-inl.h	66.66% <ø> (ø)
src/stacktrace_x86-inl.h	65.00% <ø> (ø)
src/symbolize.cc	47.04% <ø> (-7.59%)	⬇️
src/utilities.cc	71.96% <100.00%> (ø)
src/utilities.h	100.00% <ø> (ø)
src/vlog_is_on.cc	61.71% <ø> (ø)
... and 6 more