private static IReadOnlyList <string> TryReadMetadataIdentifiers(string versionString, ref int index)
{
List <string>?result = null;
while (true)
{
if (TryReadMetadataIdentifier(versionString, ref index, out var label))
{
if (result == null)
{
result = new List <string>();
}
result.Add(label);
}
if (!TryReadDot(versionString, ref index))
{
break;
}
}
return(result == null ? s_emptyArray : ReadOnlyList.From(result));
}