{"ast_node_type":"variable","tokens":[{"end":99,"kind":"keyword","start":0,"text":"let"}]}
                let c = builder.context.new_rvalue_from_vector(None, arg3_type, &[new_args[2]; 2]);
                let b = builder.context.new_rvalue_from_vector(None, arg2_type, &[new_args[1]; 2]);
                args = vec![a, b, c, new_args[3]].into();