/usr/include/swami/libswamigui/ is in libswami-dev 2.0.0+svn389-5.
This file is owned by root:root, with mode 0o755.
..
/usr/include/swami/libswamigui/SwamiguiBar.h
/usr/include/swami/libswamigui/SwamiguiBarPtr.h
/usr/include/swami/libswamigui/SwamiguiCanvasMod.h
/usr/include/swami/libswamigui/SwamiguiControl.h
/usr/include/swami/libswamigui/SwamiguiControlAdj.h
/usr/include/swami/libswamigui/SwamiguiControlMidiKey.h
/usr/include/swami/libswamigui/SwamiguiItemMenu.h
/usr/include/swami/libswamigui/SwamiguiKnob.h
/usr/include/swami/libswamigui/SwamiguiLoopFinder.h
/usr/include/swami/libswamigui/SwamiguiMenu.h
/usr/include/swami/libswamigui/SwamiguiModEdit.h
/usr/include/swami/libswamigui/SwamiguiMultiSave.h
/usr/include/swami/libswamigui/SwamiguiNoteSelector.h
/usr/include/swami/libswamigui/SwamiguiPanel.h
/usr/include/swami/libswamigui/SwamiguiPanelSF2Gen.h
/usr/include/swami/libswamigui/SwamiguiPanelSF2GenEnv.h
/usr/include/swami/libswamigui/SwamiguiPanelSF2GenMisc.h
/usr/include/swami/libswamigui/SwamiguiPanelSelector.h
/usr/include/swami/libswamigui/SwamiguiPaste.h
/usr/include/swami/libswamigui/SwamiguiPiano.h
/usr/include/swami/libswamigui/SwamiguiPref.h
/usr/include/swami/libswamigui/SwamiguiProp.h
/usr/include/swami/libswamigui/SwamiguiRoot.h
/usr/include/swami/libswamigui/SwamiguiSampleCanvas.h
/usr/include/swami/libswamigui/SwamiguiSampleEditor.h
/usr/include/swami/libswamigui/SwamiguiSpectrumCanvas.h
/usr/include/swami/libswamigui/SwamiguiSpinScale.h
/usr/include/swami/libswamigui/SwamiguiSplits.h
/usr/include/swami/libswamigui/SwamiguiStatusbar.h
/usr/include/swami/libswamigui/SwamiguiTree.h
/usr/include/swami/libswamigui/SwamiguiTreeStore.h
/usr/include/swami/libswamigui/SwamiguiTreeStorePatch.h
/usr/include/swami/libswamigui/combo-box.h
/usr/include/swami/libswamigui/help.h
/usr/include/swami/libswamigui/icon-combo.h
/usr/include/swami/libswamigui/icons.h
/usr/include/swami/libswamigui/patch_funcs.h
/usr/include/swami/libswamigui/splash.h
/usr/include/swami/libswamigui/swamigui.h
/usr/include/swami/libswamigui/util.h