/usr/include/shogun/converter/ is in libshogun-dev 1.1.0-4ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/shogun/converter/Converter.h
/usr/include/shogun/converter/DiffusionMaps.h
/usr/include/shogun/converter/EmbeddingConverter.h
/usr/include/shogun/converter/HessianLocallyLinearEmbedding.h
/usr/include/shogun/converter/Isomap.h
/usr/include/shogun/converter/KernelLocalTangentSpaceAlignment.h
/usr/include/shogun/converter/KernelLocallyLinearEmbedding.h
/usr/include/shogun/converter/LaplacianEigenmaps.h
/usr/include/shogun/converter/LinearLocalTangentSpaceAlignment.h
/usr/include/shogun/converter/LocalTangentSpaceAlignment.h
/usr/include/shogun/converter/LocalityPreservingProjections.h
/usr/include/shogun/converter/LocallyLinearEmbedding.h
/usr/include/shogun/converter/MultidimensionalScaling.h
/usr/include/shogun/converter/NeighborhoodPreservingEmbedding.h