I try to transform the source code according to my special comments like this:

{
  name: 'client-only',
  transform(src, id) {
    const code = transformSrc(src);
    return {
      code: src,
      map: null,
    };
  },
},

but src does not include any comments, i guess the comments was removed by Rollup.

how to keep the comments in src?