message: Rename `NetworkSim` to `TestHarness`.
diff: @@ -106,7 +106,7 @@ where
  }
  }
  -struct NetworkSim<M>
  +struct TestHarness<M>
  where
  M: PartialEq + Eq + Ord,
  {
  @@ -120,7 +120,7 @@ where
  duration: u64,
  }
  -impl<M> NetworkSim<M>
  +impl<M> TestHarness<M>
  where
  M: PartialEq + Eq + Ord,
  {
  