import { TreeMapper, TreeNode, TreeDefinition } from './type';
export declare function promoteSingleChild(items: TreeNode[]): TreeNode[];
export declare const getAncestorIdsByNodeId: (nodeId: string, nodes: TreeNode[], path?: TreeNode[]) => TreeNode[] | null;
export declare function collectCheckedIds(nodes: TreeNode[], multiple: boolean, acc?: string[]): string[];
export declare function normalizeStructure(nodes: TreeNode[], parents?: string[], acc?: TreeMapper, isParentSelected?: boolean): TreeMapper;
export declare function initializeTreeMapper(nodes: TreeNode[], multiple: boolean): TreeMapper;
export declare function denormalizeTree(nodes: TreeNode[], state: TreeMapper): TreeNode[];
export declare function updateTreeSelection(tree: TreeMapper, targetNodeId: string, isChecked: boolean): TreeMapper;
export declare function extractSelectedBranches(nodes: TreeNode[]): TreeNode[];
export declare function resetTreeState(tree: TreeMapper): TreeMapper;
export declare function updateSelection(tree: TreeMapper, targetNode: string, isChecked: boolean, multiple: boolean): TreeMapper;
export type GetNodesByLevelOptions = {
    filter?: (node: TreeNode) => boolean;
    includeChildren?: boolean;
};
export declare function filterNodesByLevelKey(nodes: TreeNode[], levelKey: string): TreeNode[];
export declare const TreeManager: {
    denormalizeTree: import("memoize-one").MemoizedFn<(tree: TreeNode[], mapper: TreeMapper) => TreeNode[]>;
    extractSelectedBranches: import("memoize-one").MemoizedFn<(nodes: TreeNode[]) => TreeNode[]>;
    filterNodesByLevelKey: import("memoize-one").MemoizedFn<(nodes: TreeNode[], levelKey: string) => TreeNode[]>;
};
/**
 * Applies the same single-child promotion logic as `promoteSingleChild` but
 * also handles the **root level** of a `TreeDefinition`. When the root has
 * exactly one child (and that child has its own children), the child is
 * dissolved and its grandchildren become the new root items — cascading
 * recursively until a level with more than one child is reached.
 *
 * The header / footer / searchProps of the dissolved node are inherited by
 * the promoted level so the panel still displays the correct title.
 *
 * Only the **rendered** definition should use this. The original
 * `treeDefinition.children` must be kept for state management so that
 * selection propagation remains correct across the full tree.
 */
export declare function promoteDefinition(definition: TreeDefinition): TreeDefinition;