mergeAsync function
Merge creates one multi-channel array out of several single-channel ones.
For further details, please see: https://docs.opencv.org/master/d2/de8/group__core__array.html#ga7d7b4d6c6ee504b30a20b1680029c7b4
Implementation
Future<Mat> mergeAsync(VecMat mv) async =>
cvRunAsync((callback) => cffi.core_Merge_Async(mv.ref, callback), matCompleter);