in JetBrains.Etw.HostService.Updater/src/Util/UpdateChecker.cs [149:156]
private static IReadOnlyCollection<string> GetReleaseTypes(Channels channels)
{
var res = new List<string>();
if ((channels & Channels.RTM) != 0) res.Add("release");
if ((channels & Channels.RC) != 0) res.Add("rc");
if ((channels & Channels.EAP) != 0) res.Add("eap");
return res;
}