error: Maximum supported number of params is 16
  --> $DIR/too-many-params.rs:5:2
   |
5  |       /// Has too many params
   |  _____^
6  | |     #[rpc(name = "tooManyParams")]
7  | |     fn to_many_params(
8  | |         &self,
9  | |         a: u64, b: u64, c: u64, d: u64, e: u64, f: u64, g: u64, h: u64, i: u64, j: u64,
10 | |         k: u64, l: u64, m: u64, n: u64, o: u64, p: u64, q: u64,
11 | |     ) -> Result<String>;
   | |________________________^