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/** * @name arrayUnzip * @description Splits a single [K, V][] into [K[], V[]] */export function arrayUnzip <K, V> (entries: readonly [K, V][]): [K[], V[]] {  const count = entries.length;  const keys = new Array<K>(count);  const values = new Array<V>(count);
  for (let i = 0; i < count; i++) {    [keys[i], values[i]] = entries[i];  }
  return [keys, values];}