import { HsonNode } from "../../../../core/types.js";
/**
 * Normalize an input node by removing an outer `<_hson_root>` wrapper and ensuring
 * the result is always a structural “cluster” node (`_hson_obj`, `_hson_arr`, or `_hson_elem`).
 *
 * Rules:
 * - If `node` is not `<_hson_root>`, it is returned unchanged.
 * - If `<_hson_root>` has no child nodes, returns an empty `_hson_obj` cluster.
 * - If `<_hson_root>` has exactly one child:
 *   - If that child is already `_hson_obj`, `_hson_arr`, or `_hson_elem`, return it.
 *   - Otherwise, box the single child inside a new `_hson_obj` cluster to keep a
 *     structural container as the canonical result.
 * - If `<_hson_root>` has multiple child nodes, wrap them in a new `_hson_obj` cluster.
 *
 * This is mainly used to enforce “structural-at-the-top” invariants so callers
 * can treat the returned value as a cluster node without special-casing.
 *
 * @param node - Input node that may be a `<_hson_root>` wrapper.
 * @returns A cluster node (`_hson_obj`, `_hson_arr`, or `_hson_elem`) suitable for downstream processing.
 */
export declare function unwrap_root_obj(node: HsonNode): HsonNode;
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