@Override
	public boolean hasCustomDecoration( Window window ) {
		return windowsMap.containsKey( window );
	}
Native window border support for Windows 10 when using custom decorations.
<p>
If the application wants to use custom decorations, the Windows 10 title bar is hidden
(including minimize, maximize and close buttons), but not the resize borders (including drop shadow).
Windows 10 window snapping functionality will remain unaffected:
https://support.microsoft.com/en-us/windows/snap-your-windows-885a9b1e-a983-a3b1-16cd-c531795e6241

@author Karl Tauber
@since 1.1
flatlaf-natives/flatlaf-natives-jna/src/main/java/com/formdev/flatlaf/natives/jna/windows/FlatWindowsNativeWindowBorder.java