public static long getOSBuildNumber() {
		if( osBuildNumber == Long.MIN_VALUE )
			osBuildNumber = getOSBuildNumberImpl();
		return osBuildNumber;
	}
Gets the Windows operating system build number.
<p>
Invokes Win32 API method {@code GetVersionEx()} and returns {@code OSVERSIONINFO.dwBuildNumber}.
See https://learn.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getversionexa
flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatNativeWindowsLibrary.java