Trait tract_pulse::internal::FrozenOpState  
pub trait FrozenOpState: Debug + DynClone + Send + 'static {
    // Required method
    fn unfreeze(&self) -> Box<dyn OpState, Global>;
}pub trait FrozenOpState: Debug + DynClone + Send + 'static {
    // Required method
    fn unfreeze(&self) -> Box<dyn OpState, Global>;
}