{"ast_node_type":"function","tokens":[{"end":54,"kind":"keyword","start":0,"text":"fn"}]}
    fn owner_id(&self, node: NodeId) -> hir::OwnerId {
    /// Given the id of an owner node in the AST, returns the corresponding `OwnerId`.
        hir::OwnerId { def_id: self.local_def_id(node) }