import * as React from 'react';
import * as common from 'schema-based-json-editor';
export declare class Optional extends React.Component<{
    required?: boolean;
    value?: common.ValueType;
    isReadOnly?: boolean;
    theme: common.Theme;
    locale: common.Locale;
    toggleOptional: () => void;
}, unknown> {
    render(): JSX.Element | null;
}