private bool IsStable(string packageId, Version packageVersion)
{
bool isStable;
if (_stablePackageVersions != null)
{
Version stableVersion;
isStable = _stablePackageVersions.TryGetValue(packageId, out stableVersion) && stableVersion >= packageVersion;
}
else
{
isStable = _index.IsStable(packageId, packageVersion);
}
return(isStable);
}