function createToPairs(keysFunc) {
      return function(object) {
        var tag = getTag(object);
        if (tag == mapTag) {
          return mapToArray(object);
        }
        if (tag == setTag) {
          return setToPairs(object);
        }
        return baseToPairs(object, keysFunc(object));
      };
    }
Creates a `_.toPairs` or `_.toPairsIn` function.

@private
@param {Function} keysFunc The function to get the keys of a given object.
@returns {Function} Returns the new pairs function.