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export type MergeStrategy = "array" | "stringArray" | "object";
interface DataToMerge {  mergedKeys?: Record<string, MergeStrategy>;  [key: string]: unknown;}
/** Merge the cascade data */export function mergeData(...datas: DataToMerge[]): DataToMerge {  return datas.reduce((previous, current) => {    const data: DataToMerge = { ...previous, ...current };
    // Merge special keys    const mergedKeys = {      ...previous.mergedKeys,      ...current.mergedKeys,    };
    for (const [key, type] of Object.entries(mergedKeys)) {      switch (type) {        case "stringArray":          data[key] = mergeStringArray(previous[key], current[key]);          break;        case "array":          data[key] = mergeArray(previous[key], current[key]);          break;        case "object":          data[key] = mergeObject(previous[key], current[key]);          break;      }    }
    return data;  });}
function toArray(value: unknown): unknown[] {  return Array.isArray(value)    ? value    : (value === undefined || value === null)    ? []    : [value];}
function mergeArray(previous: unknown, current: unknown): unknown[] {  return [...new Set([...toArray(previous), ...toArray(current)])];}
function mergeStringArray(previous: unknown, current: unknown): string[] {  return [...new Set(mergeArray(previous, current).map(String))];}
function mergeObject(  previous: unknown,  current: unknown,): Record<string, unknown> {  return { ...previous ?? {}, ...current ?? {} };}