{"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"self.pat_map_back.get(pat).cloned().ok_or(SyntheticSyntax)"}]}
        self.pat_map_back.get(pat).cloned().ok_or(SyntheticSyntax)
    pub fn pat_syntax(&self, pat: PatId) -> Result<ExprOrPatSource, SyntheticSyntax> {
    }