Ion searchbar - close (v4)

Ionic Framework ionic-v3
1

I have the following code

    <ion-searchbar placeholder="Pesquisar alunos"  #students
    (ionInput)="filterStudent(students.value)"
    clearIcon="close-circle"
    searchIcon="search" 
    animated
    debounce="500"
    autocorrect="off"
    cancelButtonIcon="md-arrow-back"
    *ngIf="_search"></ion-searchbar>

ion-searchbar

I would like change the search icon to arrow-back icon then when to click in button exit ou close searchbar, how to make it ?