export function filter(this: import("unified").Processor<void, import("mdast").Root, void, void>, settings_0?: Options | undefined): void | import("unified").Transformer<import("mdast").Root, import("mdast").Root>;
export type Root = import('mdast').Root;
/**
 * Configuration.
 */
export type Options = {
    /**
     * The `deny` field should be an array of rules or `undefined` (the default is
     * `undefined`).
     * When provided, *only* the rules specified are reported.
     * You cannot use both `allow` and `deny` at the same time.
     */
    deny?: string[] | undefined;
    /**
     * The `allow` field should be an array of rules or `undefined` (the default
     * is `undefined`).
     * When provided, the rules specified are skipped and not reported.
     * You cannot use both `allow` and `deny` at the same time.
     */
    allow?: string[] | undefined;
};