
    pub fn direct_child_str(&self, query: &str) -> Option<String> {
        claim_direct_child_str(self, &query)
    }

    pub fn direct_descendant(&self, query: &Claim) -> Option<String> {
        claim_direct_descendant(self, &query)
    }

    pub fn direct_descendant_str(&self, query: &str) -> Option<String> {
        claim_direct_descendant_str(self, &query)
    }
}
