import type { TreeNodeData } from '../Tree';
import type { TreeExpandedState } from '../use-tree';
export interface FlattenedTreeNodeData {
    /** Node data from tree data */
    node: TreeNodeData;
    /** Nesting level of the node, starts at 1 */
    level: number;
    /** Value of the parent node, `null` for root nodes */
    parent: string | null;
    /** Whether the node has children */
    hasChildren: boolean;
    /** Whether the node is expanded */
    expanded: boolean;
}
export declare function flattenTreeData(data: TreeNodeData[], expandedState: TreeExpandedState): FlattenedTreeNodeData[];