import { IHandle, Nil } from '@arcgis/components-utils';
export declare class Handles<T = string, H extends IHandle = IHandle> {
    /**
     * A handle to a [highlight](https://next.gha.afd.geoscene.cn/javascript/latest/api-reference/geoscene-views-layers-FeatureLayerView.html#highlight) call result.
     * The handle can be used to remove the installed highlight.
     *
     * @typedef module:geoscene/core/Handles~Handle
     *
     * @property {Function} remove - Removes the handle.
     */
    /**
     * Destroys the object, removing all the handles.
     *
     * @method destroy
     * @instance
     *
     * @example
     * let handles = new Handles();
     *
     * handles.add(reactiveUtils.when(
     *   () => !view.updating,
     *   () => {
     *     wkidSelect.disabled = false;
     *   },
     *   { once: true }
     * ));
     *
     * handles.destroy();
     */
    destroy(): void;
    private _groups;
    /**
     * Adds a group of handles.
     *
     * @method add
     * @param {module:geoscene/core/Accessor~WatchHandle | module:geoscene/core/Accessor~WatchHandle[] | module:geoscene/core/Collection<module:geoscene/core/Accessor~WatchHandle>} handles - An array or collection handles to group.
     * @param {*} [groupKey]
     *    Key identifying the group to which the handles should be added. All the handles in the group
     *    can later be removed with [Handles.remove()](https://next.gha.afd.geoscene.cn/javascript/latest/api-reference/geoscene-core-Handles.html#remove). If no
     *    key is provided the handles are added to a default group.
     *
     * @example
     * let handles = new Handles();
     *
     * handles.add(handle); // added to the default group
     * handles.add([handle1, handle2]); // added to the default group
     *
     * handles.add(handle, "handle-group");
     * handles.add([handle1, handle2], "other-handle-group");
     * @example
     * let handles = new Handles();
     *
     * handles.add(reactiveUtils.when(
     *   () => !view.updating,
     *   () => {
     *     wkidSelect.disabled = false;
     *   },
     *   { once: true }
     * ));
     * @instance
     */
    add(handles: (H | Nil)[] | H | Nil, groupKey?: T): this;
    forEach(groupKey: T, callback: (handle: H) => void): void;
    forEach(callback: (handle: H) => void): void;
    /**
     * Returns true if a group exists for the provided group key, false otherwise.
     *
     * @method has
     * @instance
     * @param {*} groupKey - group handle key
     * @return {boolean}
     */
    has(groupKey?: T): boolean;
    /**
     * Removes a group of handles.
     *
     * @method remove
     * @instance
     * @param {*} [groupKey] - A group key or an array or collection of group keys to remove.
     *
     * @example
     * let handles = new Handles();
     *
     * handles.remove(); // removes handles from default group
     *
     * handles.remove("handle-group");
     * handles.remove("other-handle-group");
     */
    remove(groupKey?: T | T[]): this;
    /**
     * Removes all handles.
     *
     * @method removeAll
     * @instance
     */
    removeAll(): this;
    private _isHandle;
    private _getOrCreateGroup;
    private _getGroup;
    private _ensureGroupKey;
    private _removeAllFromGroup;
}