I have this code where I label fingers using MediaPipe and OpenCV:

import cv2
import mediapipe as mp
from mediapipe import solutions

mp_hands = mp.solutions.hands
hands = mp_hands.Hands(
    static_image_mode=False,
    max_num_hands=2,
    min_detection_confidence=0.5,
    min_tracking_confidence=0.5,
)
mp_drawing = mp.solutions.drawing_utils

finger_indices = [
    mp_hands.HandLandmark.THUMB_TIP,
    mp_hands.HandLandmark.INDEX_FINGER_TIP,
    mp_hands.HandLandmark.MIDDLE_FINGER_TIP,
    mp_hands.HandLandmark.RING_FINGER_TIP,
    mp_hands.HandLandmark.PINKY_TIP,
]


def label_fingers(frame, fingers, hand_landmarks, frame_width, frame_height):
    font = cv2.FONT_HERSHEY_SIMPLEX
    font_scale = 1.0
    color = (255, 0, 0)
    thickness = 2
    line_type = cv2.LINE_AA

    for idx, finger in enumerate(finger_indices):
        landmark = hand_landmarks.landmark[finger]
        x = int(landmark.x * frame_width)
        y = int(landmark.y * frame_height)
        text = str(fingers[idx])
        org = (x, y)
        cv2.putText(frame, text, org, font, font_scale, color, thickness, line_type)


async def process_video_stream(frame, fingers):
    frame = cv2.resize(frame, (600, 400))
    frame = cv2.flip(frame, 1)
    rgb_frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
    result = hands.process(rgb_frame)

    if result.multi_hand_landmarks:
        frame_height, frame_width = frame.shape[:2]
        for hand_landmarks in result.multi_hand_landmarks:
            mp_drawing.draw_landmarks(
                frame,
                hand_landmarks,
                mp_hands.HAND_CONNECTIONS,
                solutions.drawing_styles.get_default_hand_landmarks_style(),
                solutions.drawing_styles.get_default_hand_connections_style(),
            )
            label_fingers(frame, fingers, hand_landmarks, frame_width, frame_height)

    return frame

The code works well, but I get the following warning message:

/home/khalid/.local/lib/python3.10/site-packages/google/protobuf/symbol_database.py:55: UserWarning: SymbolDatabase.GetPrototype() is deprecated. Please use message_factory.GetMessageClass() instead. SymbolDatabase.GetPrototype() will be removed soon.
  warnings.warn('SymbolDatabase.GetPrototype() is deprecated. Please '

I don’t know where in the code the deprecated SymbolDatabase.GetPrototype() function is being called so I can replace it with the new message_factory.GetMessageClass() method. How can I locate and update this deprecated function usage?