import type { _NSSymbolEffect } from "./NSSymbolEffect.js";
export declare class _NSSymbolAppearEffect extends _NSSymbolEffect {
    static alloc(): _NSSymbolAppearEffect;
    static new(): _NSSymbolAppearEffect;
    init(): _NSSymbolAppearEffect;
    /** The default appear effect, determined by the system. */
    static effect(): _NSSymbolAppearEffect;
    /** Convenience initializer for an appear effect that appears scaling up. */
    static appearUpEffect(): _NSSymbolAppearEffect;
    /** Convenience initializer for an appear effect that appears scaling down. */
    static appearDownEffect(): _NSSymbolAppearEffect;
    /** Returns a copy of the effect that animates incrementally, by layer. */
    effectWithByLayer(): _NSSymbolAppearEffect;
    /**
     * Returns a copy of the effect that animates all layers of the symbol simultaneously.
     */
    effectWithWholeSymbol(): _NSSymbolAppearEffect;
}
