how to get last page on click of button

[jhagaurav026]

this is my first button go to first page directly
<button @click= "goToSecondPage">First
goToSecondPage () {
if (this.$refs.paginator) {
this.$refs.paginator.goToPage(1)
}
},
same as it is i want to last page directly, so i create
Last
greet () {
var lastpage = Math.trunc(this.openticketdetail.open_tickets.length/10);
console.log(lastpage);
return this.lastpage;
},
but its not working please tell me the solution how to go last page