code: function promisifyMethods(obj, methodNames, options) {
    if (!obj) {
      // This object could be anything, including a function, a real object, or an array.
      throw new TypeError('promisify.methods requires a truthy value');
    }
  
    const out = {};
  
    for (let methodName of methodNames) {
      out[methodName] = promisify(obj[methodName].bind(obj), options);
    }
  
    return out;
  }
docs: Promisify the given names on the given object, and create a copy of the object.
  
  @param {*} obj A value that can have properties.
  @param {String[]} methodNames The methods to promisify.
  @param {Boolean|String[]} options.variadic See the documentation for promisify.
  @return {Object} The promisified object.