import { EventEmitter } from '@angular/core';
import * as common from 'schema-based-json-editor';
export declare class NullEditorComponent {
    schema: common.NullSchema;
    initialValue: null;
    title?: string;
    updateValue: EventEmitter<common.ValidityValue<null | undefined>>;
    theme: common.Theme;
    icon: common.Icon;
    locale: common.Locale;
    onDelete: EventEmitter<any>;
    readonly?: boolean;
    required?: boolean;
    hasDeleteButton: boolean;
    value?: null;
    buttonGroupStyle: string;
    ngOnInit(): void;
    toggleOptional(): void;
    readonly isReadOnly: boolean | undefined;
    readonly hasDeleteButtonFunction: boolean;
    readonly titleToShow: string;
}