function stackOffsetNone(series, order) {
  if (!((n = series.length) > 1)) return;
  for (var i = 1, j, s0, s1 = series[order[0]], n, m = s1.length; i < n; ++i) {
    s0 = s1, s1 = series[order[i]];
    for (j = 0; j < m; ++j) {
      s1[j][1] += s1[j][0] = isNaN(s0[j][1]) ? s0[j][0] : s0[j][1];
    }
  }
}

export { stackOffsetNone as default };
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