Dartma_seek_procFunction typedef
        Dartma_seek_procFunction =
     ma_result Function(Pointer<Void>  pUserData, Dartma_int64 offset, ma_seek_origin origin)
    
    
    
Implementation
typedef Dartma_seek_procFunction = ma_result Function(
    ffi.Pointer<ffi.Void> pUserData,
    Dartma_int64 offset,
    ma_seek_origin origin);