import { FilterImpl } from '../template';
export declare function escape(this: FilterImpl, str: string): string;
export declare function xml_escape(this: FilterImpl, str: string): string;
export declare function escape_once(this: FilterImpl, str: string): string;
export declare function newline_to_br(this: FilterImpl, v: string): string;
export declare function strip_html(this: FilterImpl, v: string): string;
