/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/ is in qml-module-qtquick-controls 5.7.1~20161021-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/AbstractCheckable.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/BasicButton.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/BasicTableView.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/CalendarHeaderModel.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/CalendarUtils.js
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/ColumnMenuContent.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/ContentItem.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/Control.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/EditMenu.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/EditMenu_base.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/FastGlow.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/FocusFrame.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/HoverButton.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/MenuContentItem.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/MenuContentScroller.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/MenuItemSubControls.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/ModalPopupBehavior.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/ScrollBar.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/ScrollViewHelper.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/SourceProxy.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/StackView.js
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/StackViewSlideDelegate.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/Style.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/SystemPaletteSingleton.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/TabBar.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/TableViewItemDelegateLoader.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/TableViewSelection.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/TextHandle.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/TextInputWithHandles.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/TextSingleton.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/ToolMenuButton.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/TreeViewItemDelegateLoader.qml
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/qmldir
/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/Private/style.js