/**
 * Generic tree building utilities used by ModuleRepository and FlowRepository.
 */
/**
 * Node with parent reference and children array
 */
export interface TreeNode {
    id: number;
    parentId: number | null;
}
/**
 * Build a tree structure from a flat list of nodes with parent references.
 * @returns The root node(s) with children attached
 */
export declare function buildTree<T extends TreeNode, R extends T & {
    children: R[];
}>(nodes: T[], createNode: (node: T) => R): R[];
/**
 * Build a single-root tree structure from a flat list of nodes.
 * @returns The root node or null if no nodes
 */
export declare function buildSingleRootTree<T extends TreeNode, R extends T & {
    children: R[];
}>(nodes: T[], createNode: (node: T) => R): R | null;
//# sourceMappingURL=tree-builder.d.ts.map