import type { Concept } from './models/concept.js';
import type { Register } from './models/register.js';
type SectionIdInput = string | string[];
interface BySectionOptions {
    register?: Register;
}
export declare class ConceptCollection {
    #private;
    constructor(concepts?: Iterable<Concept>);
    get length(): number;
    [Symbol.iterator](): Iterator<Concept>;
    at(index: number): Concept | undefined;
    indexOf(item: Concept, fromIndex?: number): number;
    find(fn: (c: Concept, i: number, arr: Concept[]) => unknown): Concept | undefined;
    findIndex(fn: (c: Concept, i: number, arr: Concept[]) => unknown): number;
    forEach(fn: (c: Concept, i: number) => void): void;
    map<U>(fn: (c: Concept, i: number) => U): U[];
    reduce<U>(fn: (acc: U, c: Concept, i: number) => U, init: U): U;
    includes(item: Concept): boolean;
    push(...items: Concept[]): number;
    splice(start: number, deleteCount?: number, ...items: Concept[]): Concept[];
    set(index: number, item: Concept): void;
    toArray(): Concept[];
    byId(id: string): Concept | undefined;
    byIdAnd(id: string, version: string | null): Concept | null;
    byPrefix(prefix: string): ConceptCollection;
    byLanguage(lang: string): ConceptCollection;
    byStatus(status: string): ConceptCollection;
    bySection(sectionId: SectionIdInput, options?: BySectionOptions): ConceptCollection;
    index(): Map<string, Concept>;
    sorted(): ConceptCollection;
    search(query: string): ConceptCollection;
    allLanguages(): string[];
    filter(fn: (c: Concept, i: number, arr: Concept[]) => unknown): ConceptCollection;
    slice(start?: number, end?: number): ConceptCollection;
    concat(...args: Concept[][]): ConceptCollection;
}
export {};
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