code: async function() {
        let qxpath = await this.getAppQxPath();
        return path.isAbsolute(qxpath) ? qxpath : path.resolve(qxpath);
      }
docs: Returns the absolute path to the qooxdoo framework used by the current project, unless
  the user provided a CLI option "qxpath", in which case this value is returned.
  @return {Promise(String)} Promise that resolves with the absolute path