private void uninstall( Window window ) {
		WndProc wndProc = windowsMap.remove( window );
		if( wndProc != null )
			wndProc.uninstall();
	}
Tell the window whether the application wants to use custom decorations.
If {@code true}, the Windows 10 title bar is hidden (including minimize,
maximize and close buttons), but not the resize borders (including drop shadow).
flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatWindowsNativeWindowBorder.java