import { jsonschema } from '../types';
/**
 * A type that requires it to contain all keys from another type
 *
 * Forcing developers to type out a Javascript expression and having TypeScript
 * check that it is complete is the only way to get a list of keys defined in a type.
 */
export type TypeKeyWitness<T extends object> = {
    [K in keyof T]-?: true;
};
export declare const STRING_KEY_WITNESS: TypeKeyWitness<jsonschema.String>;
export declare const NUMBER_KEY_WITNESS: TypeKeyWitness<jsonschema.Number>;
export declare const OBJECT_KEY_WITNESS: TypeKeyWitness<jsonschema.Object>;
export declare const ARRAY_KEY_WITNESS: TypeKeyWitness<jsonschema.SchemaArray>;
export declare const BOOLEAN_KEY_WITNESS: TypeKeyWitness<jsonschema.Boolean>;
export declare const NULL_KEY_WITNESS: TypeKeyWitness<jsonschema.Null>;
export declare function retainRelevantKeywords<A extends object>(x: object, witness: TypeKeyWitness<A>): A;
export declare function witnessForType(type: string): TypeKeyWitness<any>;