message: Simplify type signatures.
diff: @@ -792,13 +792,8 @@ impl<DS: DeliveryStrategy> HighwayTestHarnessBuilder<DS> {
  .unwrap_or_else(|| (weights_sum.0 - 1) / 3);
  // Local function creating an instance of `HighwayConsensus` for a single validator.
  - let highway_consensus = |(vid, secrets): (
  - <TestContext as Context>::ValidatorId,
  - &mut HashMap<
  - <TestContext as Context>::ValidatorId,
  - <TestContext as Context>::ValidatorSecret,
  - >,
  - )| {
  + let highway_consensus =
  + |(vid, secrets): (ValidatorId, &mut HashMap<ValidatorId, TestSecret>)| {
  let v_sec = secrets.remove(&vid).expect("Secret key should exist.");
  let (highway, effects) = {
  