docs: function(addExtraWatchers) {
    /* Watchers -------------------------------------------------------------- */
    gulp.task('watch', ['serve'], function () {
      gulp.watch(paths.src.es6, ['bundle-js:dev:clean']);
      gulp.watch(paths.src.js, ['bundle-js:dev:clean']);
      gulp.watch(paths.src.styles, ['styles']);
      gulp.watch(paths.src.views, ['tpl-reload']);
      gulp.watch(paths.out.base + '**/*', ['reload']);
  
      addExtraWatchers && addExtraWatchers(gulp);
    });
  }