{"ast_node_type":"function","tokens":[{"end":92,"kind":"keyword","start":0,"text":"pub"}]}
    pub fn closure_sig(&self, args_ref: GenericArgsRef<'tcx>) -> Binder<'tcx, FnSig<'tcx>> {
    /// Retrieve the closure signature for the given generic arguments.
        args_ref.as_closure().sig()