https://es.mathworks.com/help/bugfinder/ref/misrac2023rule5.9.html
MISRA C:2023 Rule 5.9 - Identifiers that define objects or functions with internal linkage should...
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internal linkagemisracruleidentifiers
https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p1498r1.html
P1498R1: Constrained Internal Linkage for Modules
internal linkagemodules
https://ceres-solver.googlesource.com/ceres-solver/+/b83abdcb19ee85dd90fd882b7f904df157f9c7cd/internal/ceres/single_linkage_clustering.cc?autodive=0%2F
internal/ceres/single_linkage_clustering.cc - ceres-solver - Git at Google
internalceressinglelinkageclustering