error with cv2.face.mindistancepredictcollector()

edit

i have installed opencv 3.1.0 with extra modules.

but when i try to use

>>> s = cv2.face.MinDistancePredictCollector()

it returns an error

Traceback (most recent call last):
File "<pyshell#5>", line 1, in <module>
s = cv2.face.MinDistancePredictCollector()
AttributeError: 'module' object has no attribute 'MinDistancePredictCollector'

i also tried this

>>> help(cv2.face)
Help on module cv2.face in cv2:

NAME
    cv2.face

FILE
    (built-in)

FUNCTIONS
    StandardCollector_create(...)
    StandardCollector_create([, threshold]) -> retval

    createEigenFaceRecognizer(...)
    createEigenFaceRecognizer([, num_components[, threshold]]) -> retval

    createFisherFaceRecognizer(...)
    createFisherFaceRecognizer([, num_components[, threshold]]) -> retval

    createLBPHFaceRecognizer(...)
    createLBPHFaceRecognizer([, radius[, neighbors[, grid_x[, grid_y[,    threshold]]]]]) -> retval

there is no exist for MinDistancePredictCollector() so how can i install it??