export function deepClone<T>(source: T) {
  if (typeof source !== 'object' || source === null) {
    return source
  }
  let result = (Array.isArray(source) ? [] : {}) as T
  for (let key in source) {
    if (Object.prototype.hasOwnProperty.call(source, key)) {
      result[key] = (typeof source[key] === 'object') ? deepClone(source[key]) : source[key]
    }
  }
  return result
}