code: function splitImportsList(text) {
      const list = [];
      list.push(...text
          .split(',')
          .map(s => s.trim())
          .filter(s => s !== '')
      );
      return list;
  }
docs: split ImportsList by ','
  here wo do not check the correctness of ImportSpecifiers in ImportsList, just tolerate it
  @param {*} text