Note that you shouldn’t assume the window is definitely minimized
afterward, because the windowing system might not support this
functionality; other entities (e.g. the user or the window manager)
could unminimize it again, or there may not be a window manager in
which case minimization isn’t possible, etc.
It’s permitted to call this function before showing a window,
in which case the window will be minimized before it ever appears
onscreen.
Asks to minimize the specified window.
Note that you shouldn’t assume the window is definitely minimized afterward, because the windowing system might not support this functionality; other entities (e.g. the user or the window manager) could unminimize it again, or there may not be a window manager in which case minimization isn’t possible, etc.
It’s permitted to call this function before showing a window, in which case the window will be minimized before it ever appears onscreen.
You can track result of this operation via the gdk.toplevel.Toplevel.ToplevelState property.