///|
pub fn best_insertions_for_customer(
  instance : VrpInstance,
  solution : Solution,
  customer_index : Int,
  config : SolveConfig,
) -> Array[CandidateInsertion] {
  let candidates : Array[CandidateInsertion] = []
  let base_routes = solution.route_stops()
  for route_index in 0.. right.objective {
      1
    } else {
      0
    }
  })
  candidates
}