Directives: Reference the command's subject when setting parameter name

I'm trying to use a directive on all of my cmdlets that end up with the `Import` verb and that have an `Id` parameter to change the parameter name to be `[subject]Id`. I didn't think this was possible until I was looking through the directives that the Microsoft.Graph module SDK uses. They have a directive that looks like this:

```yaml
- where:
subject: ^(User|ServicePrincipal|Contact|Device)(Member|TransitiveMember)ByRef$
set:
alias: ${verb}-Mg${subject}
```

So I was hoping to be able to do something similar for parameter names:

```yaml
- where:
verb: Import
parameter-name: Id
set:
parameter-name: ${subject}Id
```

With this, as an example, if I had a cmdlet called `Import-RwRunner` I would expect the `Id` parameter to then become `RunnerId`. However, it literally becomes `${subject}Id`. Here's the parameter from the cmdlet.cs file:

```csharp
private string _${subject}Id;
```

And, obviously, this doesn't build.

Is this supported? Or am I doing it wrong?

If it's not supported, is there a way I can make this change without updating the OpenAPI doc?