export declare const TOAST_BOX_HEIGHT = 3;
export declare const TOAST_REST_TOP = 1;
export declare const TOAST_HIDDEN_TOP: number;
export type ToastAnimPhase = "enter" | "hold" | "exit" | "gone";
export interface ToastAnimState {
    readonly phase: ToastAnimPhase;
    readonly top: number;
    readonly visibility: number;
}
export declare function toastAnimAt(ageMs: number, holdMs: number, boxHeight?: number): ToastAnimState;