import type { UmbTreeContext } from '../tree.context.interface.js';
import type { UmbTreeItemModel, UmbTreeRootModel } from '../types.js';
import { UmbLitElement } from '../../lit-element/index.js';
/**
 * Base class for tree view elements, providing the tree's root and selection state to subclasses.
 * @template TreeItemType - The tree item model rendered by this view.
 * @template TreeRootType - The tree root model for this view.
 */
export declare abstract class UmbTreeViewElementBase<TreeItemType extends UmbTreeItemModel = UmbTreeItemModel, TreeRootType extends UmbTreeRootModel = UmbTreeRootModel> extends UmbLitElement {
    protected _treeContext?: UmbTreeContext<TreeItemType, TreeRootType>;
    protected _treeRoot?: TreeRootType;
    protected _selectable: boolean;
    protected _selectOnly: boolean;
    protected _selection: Array<string | null>;
    constructor();
    protected _gotTreeContext(): void;
    protected _isSelectableItem(item: TreeItemType): boolean;
    protected _isSelectedItem(unique: string | null): boolean;
    protected _selectItem(unique: string | null): void;
    protected _deselectItem(unique: string | null): void;
}