export type JsonSchema = Record<string, unknown>;
export declare function includesType(schema: JsonSchema, type: string): boolean;
/**
 * Prepares a schema for json-schema-faker's `generate()` so the Example tab
 * shows something plausible and consistent with the Schema tab:
 *
 * - Leftover `$ref` nodes (resolveDocument's cycle cut-points) are unrolled
 *   exactly one level via `deref`, so a recursive schema's example shows one
 *   real nested occurrence. The second occurrence of the same ref on a path
 *   is cut to `{ type: "null" }` when the target allows null, else `{}`.
 *   Without this, generate() would throw on the unresolvable pointer and the
 *   tab would silently render nothing.
 * - `oneOf`/`anyOf` collapse to their first branch, matching the case
 *   SchemaTree shows by default, instead of letting generate() pick an
 *   unrelated-looking one.
 * - Plain string fields get placeholder examples (and `*id` fields a uuid
 *   format) instead of random character noise.
 */
export declare function extendExampleSchema(schema: JsonSchema, deref?: (ref: string) => unknown, active?: Set<object>, refStack?: ReadonlySet<string>): JsonSchema;