Write Concise Declarative Functions with ES6 help

Tell us what’s happening:

I don’t know why can’t work?
Because I have dele function.:expressionless:

Your code so far

// change code below this line
const bicycle = {
  gear: 2,
  setGear: (newGear) {
    "use strict";
    this.gear = newGear;
// change code above this line

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36.

Link to the challenge:

in concole there is a hint:
SyntaxError: unknown: Unexpected token, expected , (4:21)

and this is marked:
setGear: (newGear) {

compare that with the example:
sayHello() {