Object.isExtensible()
Object.getOwnPropertyNames()
Array.prototype.slice()
Array.prototype.every()
Python
Object.setPrototypeOf()
Node
Object.getOwnPropertyNames()
Object.setPrototypeOf()
Array.prototype.indexOf()
Object.defineProperties()
Object.defineProperty()
Object.getOwnPropertyNames()
Object.getOwnPropertyDescriptor()
Object.assign()