Function voter_at_fn

pub fn voter_at_fn<T: MinerConfig>(
    snapshot: &Vec<MinerVoterOf<T>>,
) -> impl Fn(SolutionVoterIndexOf<T>) -> Option<T::AccountId> + '_

Create a function that can map a voter index (SolutionVoterIndexOf) to the actual voter account using a linearly indexable snapshot.