function storeResult(resultsObj, exportId, filteredList, meta) {
  if (!resultsObj[exportId]) {
    // eslint-disable-next-line no-param-reassign
    resultsObj[exportId] = { meta };
  }
  // eslint-disable-next-line no-param-reassign
  resultsObj[exportId].files = [...(resultsObj[exportId].files || []), ...Array.from(filteredList)];
}
Helper method for matchImportsPostprocess. Modifies its resultsObj
@param {object} resultsObj
@param {string} exportId like 'myExport::./reference-project/my/export.js::my-project'
@param {Set<string>} filteredList