DartLsl_push_sample_str typedef
        DartLsl_push_sample_str =
     int Function(lsl_outlet out, Pointer<Pointer<Char> >  data)
    
    
    
Implementation
typedef DartLsl_push_sample_str =
    int Function(lsl_outlet out, ffi.Pointer<ffi.Pointer<ffi.Char>> data);