import type { CBORSchemaType } from "./type.js";
/**
 * Creates a schema for nested CBOR data (CBOR within CBOR)
 *
 * @template T The type of the nested data
 * @param innerSchema Schema for the nested data
 *
 * @example
 * ```typescript
 * import { cs } from "../cbor_schema.ts";
 * const metadataSchema = cs.map([
 *   cs.field("version", cs.integer)
 * ]);
 *
 * const documentSchema = cs.map([
 *   cs.field("content", cs.string),
 *   cs.field("metadata", cs.nested(metadataSchema))
 * ]);
 *
 * const doc = {
 *   content: "Hello",
 *   metadata: { version: 1 }
 * };
 *
 * const encoded = cs.toCBOR(documentSchema, doc);
 * const decoded = cs.fromCBOR(documentSchema, encoded);
 * ```
 */
export declare function nested<T>(innerSchema: CBORSchemaType<T>): CBORSchemaType<T>;
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