rotateAsync function
Rotate rotates a 2D array in multiples of 90 degrees
For further details, please see: https://docs.opencv.org/master/d2/de8/group__core__array.html#ga4ad01c0978b0ce64baa246811deeac24
Implementation
Future<Mat> rotateAsync(InputArray src, int rotateCode) async =>
cvRunAsync((callback) => cffi.core_Rotate_Async(src.ref, rotateCode, callback), matCompleter);