Ignore inner tokens in parses_to?

[hillin]

In some test cases in our project, the token tree can grow very complex and we actually only want to test if the root tiers are correctly parsed. To my understanding, if we want to use the parses_to macro, we have to specify the exact expected token tree. Is there a way to omit a sub-token-tree that we are not interested of?

e.g.

let input = "@something { whose value we *don't* care, but has to satisfy certain syntax }";
parses_to! {
    parser: MyParser,
    input: &input,
    rule: Rule::directive,
    tokens: [
        directive(0, input.len(), [
                directive_name(0, 10),
                directive_value(11, input.len(), [
                    /* here is the part we don't care about and would like to omit */
                ]),
        ])
    ]
};