import { JSONSchema4 } from 'json-schema';
/**
 * Many schemas define a type as an array of types to indicate union types.
 * To avoid having the type generator be aware of that, we transform those types
 * into their corresponding typescript definitions.
 *
 * --------------------------------------------------
 *
 * The null union can be in one of these three fields: type, anyOf or oneOf
 */
export declare function reduceNullFromUnions(def: JSONSchema4): JSONSchema4;