def _new_centroid(x, n, cumn)
      c = Centroid.new(x, n, cumn)
      @centroids[x] = c
      c
    end
def _new_centroid(x, n, cumn)
      c = Centroid.new(x, n, cumn)
      @centroids[x] = c
      c
    end
rubocop:enable Metrics/PerceivedComplexity, Metrics/CyclomaticComplexity,
 rubocop:enable Metrics/AbcSize