Function _treeExtendApi

lib/index.js:271–275

* Extension of options tree * * @private * * @param {Array} tree * @param {Object} PostHTML * @returns {?*}

(t, _t)

 * @returns {?*}
 */
function _treeExtendApi (t, _t) {
  if (typeof t === 'object') {
    t = Object.assign(t, _t)
  }
}

/**
 * Checks if parameter is a Promise (or thenable) object.