MPPFaceDetectorResult
@interface MPPFaceDetectorResult : MPPTaskResultRepresents the detection results generated by FaceDetector.
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                  The array of Detectionobjects each of which has a bounding box that is expressed in the unrotated input frame of reference coordinates system, i.e. in[0,image_width) x [0,image_height), which are the dimensions of the underlying image data.DeclarationObjective-C @property (nonatomic, readonly) NSArray<MPPDetection *> *_Nonnull detections;
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                  Initializes a new FaceDetectorResultwith the given array of detections and timestamp (in milliseconds).DeclarationObjective-C - (nonnull instancetype)initWithDetections: (nonnull NSArray<MPPDetection *> *)detections timestampInMilliseconds:(NSInteger)timestampInMilliseconds;ParametersdetectionsAn array of Detectionobjects each of which has a bounding box that is expressed in the unrotated input frame of reference coordinates system, i.e. in[0,image_width) x [0,image_height), which are the dimensions of the underlying image data.timestampInMillisecondsThe timestamp (in milliseconds) for this result. Return ValueAn instance of FaceDetectorResultinitialized with the given array of detections and timestamp (in milliseconds).