import type { HasIncludes, Maybe } from './assertions/-type-helpers.js';
export declare function setup(assert: Assert): void;
declare global {
    interface Assert {
        contains<Actual extends HasIncludes<ExpectedItem>, ExpectedItem>(source?: Maybe<Actual>, sub?: Maybe<ExpectedItem>, message?: string): void;
        notContains<Actual extends HasIncludes<UnexpectedItem>, UnexpectedItem>(source?: Maybe<Actual>, sub?: UnexpectedItem, message?: string): void;
        matches(source?: Maybe<string>, regex?: Maybe<RegExp>, message?: string): void;
        notMatches(source?: Maybe<string>, regex?: Maybe<RegExp>, message?: string): void;
    }
}