NativeLsl_push_sample_it typedef
        NativeLsl_push_sample_it =
     Int32 Function(lsl_outlet out, Pointer<Int32>  data, Double timestamp)
    
    
    
Implementation
typedef NativeLsl_push_sample_it =
    ffi.Int32 Function(
      lsl_outlet out,
      ffi.Pointer<ffi.Int32> data,
      ffi.Double timestamp,
    );