/usr/include/shogun/kernel/normalizer/ is in libshogun-dev 3.1.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/shogun/kernel/normalizer/AvgDiagKernelNormalizer.h
/usr/include/shogun/kernel/normalizer/DiceKernelNormalizer.h
/usr/include/shogun/kernel/normalizer/FirstElementKernelNormalizer.h
/usr/include/shogun/kernel/normalizer/IdentityKernelNormalizer.h
/usr/include/shogun/kernel/normalizer/KernelNormalizer.h
/usr/include/shogun/kernel/normalizer/RidgeKernelNormalizer.h
/usr/include/shogun/kernel/normalizer/ScatterKernelNormalizer.h
/usr/include/shogun/kernel/normalizer/SqrtDiagKernelNormalizer.h
/usr/include/shogun/kernel/normalizer/TanimotoKernelNormalizer.h
/usr/include/shogun/kernel/normalizer/VarianceKernelNormalizer.h
/usr/include/shogun/kernel/normalizer/ZeroMeanCenterKernelNormalizer.h