import { AnimationTriggerMetadata } from '@angular/animations';
/**
 * Function TdCollapseAnimation
 *
 * params:
 * * duration: Duration of animation in miliseconds. Defaults to 120 ms.
 *
 * Returns an [AnimationTriggerMetadata] object with states for a collapse/expand animation.
 *
 * usage: [@tdCollapse]="true|false"
 */
export declare function TdCollapseAnimation(duration?: number): AnimationTriggerMetadata;