cdef class Detection:
    cdef public double x, y, w, h, confidence
    cdef public str annotation_name
    cdef public int cls

    def __init__(self, double x, double y, double w, double h, int cls, double confidence): ...
    cdef bint overlaps(self, Detection det2, float confidence_threshold)

cdef class Annotation:
    cdef public str name
    cdef public str original_media_name
    cdef long time
    cdef public list[Detection] detections
    cdef public bytes image

    def __init__(self, str name, str original_media_name, long ms, list[Detection] detections): ...
    cdef bytes serialize(self)