{"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"self.with_generic_param_rib("}]}
                self.with_generic_param_rib(
                let span = ty.span.shrink_to_lo().to(fn_ptr.decl_span.shrink_to_lo());
                    &fn_ptr.generic_params,