how set timeout in method vueJs

hy all, I have quetion about vueJs
how I can settimeout in method vueJs, I have try like this but dosent work

fetchHole: function () { //get data },

 addHole: function () {
 //my query add new
setTimeout(function () { this.fetchHole() }, 1000)
},

and for msg error : Uncaught TypeError: this.fetchHole is not a function

thanks

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