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import { Component, Input } from '@angular/core' @Component({ selector: 'my-table-expander-icon', template: ` <span class="expander"> <i [ngClass]="expanded ? 'glyphicon glyphicon-menu-down' : 'glyphicon glyphicon-menu-right'"></i> </span>` }) export class TableExpanderIconComponent { @Input() expanded: boolean }