NativeLsl_push_chunk_buftp typedef
        NativeLsl_push_chunk_buftp =
     Int32 Function(lsl_outlet out, Pointer<Pointer<Char> >  data, Pointer<Uint32>  lengths, UnsignedLong data_elements, Double timestamp, Int32 pushthrough)
    
    
    
Implementation
typedef NativeLsl_push_chunk_buftp =
    ffi.Int32 Function(
      lsl_outlet out,
      ffi.Pointer<ffi.Pointer<ffi.Char>> data,
      ffi.Pointer<ffi.Uint32> lengths,
      ffi.UnsignedLong data_elements,
      ffi.Double timestamp,
      ffi.Int32 pushthrough,
    );