import { type OpenAPIV3 } from 'openapi-types';
/**
 * Extend a JSON schema by copying its properties.
 *
 * This creates a new schema based on the input schema, where `required` and `properties` are
 * inherited from the `base` schema.
 *
 * @param base The base schema whose properties to inherit.
 * @param schema The schema overriding the base schema.
 * @param omit Properties to omit from the base schema.
 * @returns The schema which extends the base schema.
 */
export declare function extendJSONSchema(base: OpenAPIV3.SchemaObject, schema: OpenAPIV3.SchemaObject, omit?: string[]): OpenAPIV3.SchemaObject;