How to use the is operator with Type?

[SetTrend]

To me, it looks like the is pattern operator can only be used with constant types, like if (a is Stream) {}.

But how is it used for performing a runtime Type check?

The following results in a compile time error:

public override IEnumerable<TokenNode> Ancestors(Type nodeType)
{
  for (TokenNode? node = Parent;node is not null;node = node.Parent) if (node is nodeType) yield return node;
}

// CS0029: Cannot implicitly convert type 'System.Type' to 'TokenNode'

[333fred]

It cannot be used here.