如何使用fabricJS对象实现多重继承？

// 创建基础对象
var BaseObject = {
  baseProperty: 'Base Property',
  baseMethod: function() {
    console.log('Base Method');
  }
};

// 创建扩展对象
var Extension1 = {
  extension1Property: 'Extension 1 Property',
  extension1Method: function() {
    console.log('Extension 1 Method');
  }
};

var Extension2 = {
  extension2Property: 'Extension 2 Property',
  extension2Method: function() {
    console.log('Extension 2 Method');
  }
};

// 合并扩展对象到基础对象中
fabric.util.object.extend(BaseObject, Extension1, Extension2);

// 创建实例对象
var instance = Object.create(BaseObject);

// 调用继承的属性和方法
console.log(instance.baseProperty); // 输出：Base Property
console.log(instance.extension1Property); // 输出：Extension 1 Property
console.log(instance.extension2Property); // 输出：Extension 2 Property

instance.baseMethod(); // 输出：Base Method
instance.extension1Method(); // 输出：Extension 1 Method
instance.extension2Method(); // 输出：Extension 2 Method