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/** * Derived from <https://github.com/rollup/rollup/blob/v2.42.3/src/utils/ensureArray.ts> */
/** * ensureArray * * @param {any} items * @returns {any[]} * @private */export function ensureArray<T>(  items: (T | null | undefined)[] | T | null | undefined,): T[] {  if (Array.isArray(items)) {    return items.filter(Boolean) as T[];  } else if (items) {    return [items];  }
  return [];}