getValueByKey looks broken

[asvae]

export const getValueByKey = <T extends (string | number | Record<string, unknown>)> (
  option: T,
  prop: string | ((option: T) => any),
): any => {
  // Can't access not object option
  if (typeof option !== 'object' || !option) { return undefined } // Option can be array, string, symbol, Date or anything else. 

  if (!prop) { return option }
  if (typeof prop === 'string') { return getValueByPath(option, prop) }
  if (typeof prop === 'function') { return prop(option) }
  return option // What is this line doing?
}