C# .NET GetOption doesn't have a way to test a descriptor for options

[thesoftwarejedi]

Regarding the recent C# Custom Options

CustomOptions on Descriptors is now Obsolete. The replacement GetOption throws an exception if the descriptor has no options. Is there any way to test for this now?

The only workaround I can find is simply using the old way of doing a TryGet, which is an Obsolete way of doing it. CustomOptions doesn't even provide a way to determine if it is

//if I have to do this, I might as well just get the message when I check, but this is for example purposes
if (messageDescriptor?.CustomOptions.TryGetBytes(SomeExtensions.SomeOption.FieldNumber, out var nothing) ?? false)
{
    //this line will throw if the message has no `CustomOptions`
    SomeOption o = messageDescriptor?.GetOption<SomeOption>(SomeExtensions.SomeOption);
    return o;
}
return null;

I'm trying to test messages dynamically for options that they may not have.

CC: @ObsidianMinor

[ObsidianMinor]

I have a PR open that adds null checks and discusses a "TryGetOption" API that doesn't return the default value here: #7130

[thesoftwarejedi]

Perfect. I left a comment there but that looks like exactly what I would want. Thanks!

[jtattermusch]

This is dupe of #7127.