control

    Source: libdemo
    Section: unknown
    Priority: extra
    Maintainer: Foo Bar <foo.bar@example.org>
    Build-Depends: debhelper (>=9)
    Standards-Version: 3.9.8
    Homepage: https://libdemo.example.org

    Package: libdemo
    Architecture: any
    Multi-Arch: foreign
    Depends: ${misc:Depends}, ${shlibs:Depends}
    Description: Demonstration library
     This library serves only the purpose of demonstration