import { InternalConstructorTag } from "../../utils/InternalConstructorTag";
import { GroupLayer } from "../GroupLayer";
import { ChildrenCollection } from "../shared/ChildrenCollection";
import { GET_PARENT, GET_RAW_LAYERS } from "../shared/internals";
import { LayerRetrievalOptions, RecursiveRetrievalOptions } from "../shared/LayerRetrievalOptions";
import { AnyLayer, Layer } from "../unions";
/**
 * Contains {@link Layer} instances that belong to a {@link GroupLayer}
 *
 * @group Layer Utilities
 */
export declare class GroupLayerCollection implements ChildrenCollection<Layer> {
    #private;
    /** @internal */
    constructor(layers: Layer[], parent: GroupLayer, tag: InternalConstructorTag);
    /**
     * Destroys this collection, all contained layers are detached from their parent group layer
     */
    destroy(): void;
    getItems(options?: LayerRetrievalOptions): Layer[];
    /**
     * Returns all layers in this collection
     */
    getLayers(options?: LayerRetrievalOptions | undefined): Layer[];
    /**
     * Returns a list of all layers in the collection, including all children (recursively).
     *
     * > Note: This includes base layers by default (see `options.filter`).
     * > Use the `"base"` or `"operational"` short hand values to filter by base layer or operational layers.
     * >
     * > If the group contains many, deeply nested sub groups, this function could potentially be expensive.
     */
    getRecursiveLayers(options?: RecursiveRetrievalOptions): AnyLayer[];
    /**
     * Returns a reference to the internal group layer array.
     *
     * NOTE: Do not modify directly!
     *
     * @internal
     */
    [GET_RAW_LAYERS](): Layer[];
    /**
     * Returns the parent group layer that owns this collection.
     *
     * @internal
     */
    [GET_PARENT](): GroupLayer;
}