public static ReadonlyEvent Parse(string message, IServiceProvider service)
{
var separator = message.IndexOf('|');
if (separator == -1)
{
throw new TodoException("Handle this erronenous input");
}
var header = message.Substring(0, separator);
var tail = message.Substring(separator + 1);
return(Parse(EventHeader.FromString(header), tail, service));
}