
    <nz-input-group [nzSuffix]="suffixIcon">
      <input type="text" nz-input placeholder="Search" [(ngModel)]="searchValue" />
    </nz-input-group>
    <ng-template #suffixIcon>
      <nz-icon nzType="search" />
    </ng-template>
    <br />
    <nz-tree
      [nzData]="nodes"
      [nzSearchValue]="searchValue"
      (nzClick)="nzEvent($event)"
      (nzExpandChange)="nzEvent($event)"
      (nzSearchValueChange)="nzEvent($event)"
    ></nz-tree>
  