export declare const BREAK: unique symbol;
export declare const FOUND: symbol;
/**
 * Generic graph/tree traversal supporting both DFS and BFS
 * @param root - Starting node(s)
 * @param mode - "d" for DFS (depth-first), "b" for BFS (breadth-first)
 * @param traverser - Function receiving (node, path) where path is ancestors from root (not including node).
 *                    Returns next nodes, or BREAK to stop and return current node.
 * @param cycle_breaker - Optional function or boolean for cycle detection
 * @returns The node that caused a BREAK, or null if traversal completed
 */
export declare function traverse<T>(root: T | T[], mode: "d" | "b", traverser: (node: T, path: T[]) => T[] | typeof BREAK | null, cycle_breaker?: boolean | ((node: T) => any) | null): T | null;
export declare function bft<T>(root: T | T[], traverser: (node: T, path: T[]) => T[] | typeof BREAK): T | null;
export declare function dft<T>(root: T | T[], traverser: (node: T, path: T[]) => T[] | typeof BREAK): T | null;