/usr/include/shogun/transfer/ is in libshogun-dev 3.2.0-7.3build4.
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..
/usr/include/shogun/transfer/domain_adaptation/
/usr/include/shogun/transfer/domain_adaptation/DomainAdaptationMulticlassLibLinear.h
/usr/include/shogun/transfer/domain_adaptation/DomainAdaptationSVM.h
/usr/include/shogun/transfer/domain_adaptation/DomainAdaptationSVMLinear.h
/usr/include/shogun/transfer/multitask/
/usr/include/shogun/transfer/multitask/LibLinearMTL.h
/usr/include/shogun/transfer/multitask/MultitaskClusteredLogisticRegression.h
/usr/include/shogun/transfer/multitask/MultitaskKernelMaskNormalizer.h
/usr/include/shogun/transfer/multitask/MultitaskKernelMaskPairNormalizer.h
/usr/include/shogun/transfer/multitask/MultitaskKernelMklNormalizer.h
/usr/include/shogun/transfer/multitask/MultitaskKernelNormalizer.h
/usr/include/shogun/transfer/multitask/MultitaskKernelPlifNormalizer.h
/usr/include/shogun/transfer/multitask/MultitaskKernelTreeNormalizer.h
/usr/include/shogun/transfer/multitask/MultitaskL12LogisticRegression.h
/usr/include/shogun/transfer/multitask/MultitaskLeastSquaresRegression.h
/usr/include/shogun/transfer/multitask/MultitaskLinearMachine.h
/usr/include/shogun/transfer/multitask/MultitaskLogisticRegression.h
/usr/include/shogun/transfer/multitask/MultitaskROCEvaluation.h
/usr/include/shogun/transfer/multitask/MultitaskTraceLogisticRegression.h
/usr/include/shogun/transfer/multitask/Task.h
/usr/include/shogun/transfer/multitask/TaskGroup.h
/usr/include/shogun/transfer/multitask/TaskRelation.h
/usr/include/shogun/transfer/multitask/TaskTree.h