code: function ArrayIncludes(searchElement, fromIndex) {
    CHECK_OBJECT_COERCIBLE(this, "Array.prototype.includes");
  
    var array = TO_OBJECT(this);
    var length = TO_LENGTH(array.length);
  
    return InnerArrayIncludes(searchElement, fromIndex, array, length);
  }
docs: ES2016 draft, section 22.1.3.11