/**
 * A {@link DecrossDfs} heuristic for quickly producing reasonable crossings.
 * This is intended for use as an initialization step.
 *
 * @packageDocumentation
 */
import type { Decross } from ".";
/**
 * a depth first search operator
 *
 * This is a fast heuristic that runs a depth first search, incrementally
 * adding nodes to their appropriate layer. It creates a reasonable ordering to
 * potentially be further optimized by other operators.
 */
export interface DecrossDfs extends Decross<unknown, unknown> {
    /**
     * sets whether the dfs should be top down or bottom up
     *
     * This has a small tweak in effect and can be useful for multiple initial
     * configurations.
     *
     * (default: `true`)
     */
    topDown(val: boolean): DecrossDfs;
    /**
     * get whether the current operator is topDown
     */
    topDown(): boolean;
    /** @internal flag indicating that this is built in to d3dag and shouldn't error in specific instances */
    readonly d3dagBuiltin: true;
}
/**
 * create a default {@link DecrossDfs}
 *
 * This is a fast heuristic decrossings operator that runs a depth first
 * search, incrementally adding nodes to their appropriate layer. It creates a
 * reasonable ordering to potentially be further optimized by other operators.
 *
 * @example
 * ```ts
 * const layout = sugiyama().decross(decrossDfs());
 * ```
 */
export declare function decrossDfs(...args: never[]): DecrossDfs;