DartLsl_pull_sample_c typedef
        DartLsl_pull_sample_c =
     double Function(lsl_inlet in$, Pointer<Char>  buffer, int buffer_elements, double timeout, Pointer<Int32>  ec)
    
    
    
Implementation
typedef DartLsl_pull_sample_c =
    double Function(
      lsl_inlet in$,
      ffi.Pointer<ffi.Char> buffer,
      int buffer_elements,
      double timeout,
      ffi.Pointer<ffi.Int32> ec,
    );