import type { ResolutionNode } from './types';
/**
 * Expands top-level ChoiceNodes in a ResolutionNode array into the
 * cross-product of all possible combinations.
 *
 * Given `[A, Choice([B, C]), D]`:
 * - Position 0: A (1 alternative)
 * - Position 1: B or C (2 alternatives)
 * - Position 2: D (1 alternative)
 * - Cross-product: [[A, B, D], [A, C, D]]
 *
 * Nested ChoiceNodes within a branch are flattened (a Choice inside
 * a Choice is treated as additional alternatives). However, this
 * does NOT recurse into leaf values — ChoiceNodes inside
 * ExtractionElement.c or ExtractionGTProp.b are passed through
 * unexpanded. Leaf-level expansion will require a recurseIntoLeaf
 * callback (not yet implemented).
 *
 * @typeParam T - The leaf content type
 * @param nodes - The array of resolution nodes to expand
 * @returns Array of all possible combinations. Each inner array
 *   is one variant with all ChoiceNodes resolved to a single branch.
 *   Returns `[nodes as T[]]` if no ChoiceNodes are found.
 */
export declare function multiply<T>(nodes: ResolutionNode<T>[]): T[][];
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