qml-module-qtquick-extras-dbgsym 5.7.1~20161021-2build1~2 (arm64 binary) in ubuntu artful

 Qt is a cross-platform C++ application framework. Qt's primary feature
 is its rich set of widgets that provide standard GUI functionality.
 .
 The Qt Quick Extras module provides a set of extra components that can be
 used to build complete interfaces in Qt Quick.