import { StringEncoding } from "iconv-corefoundation";
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import Context from "./Context";
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import Labels from "./Labels";
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export declare class NoSuchLanguageError extends Error {
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lang: LangSpecs;
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constructor(lang: LangSpecs);
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}
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export declare abstract class Language {
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static byTag: {
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[langTag: string]: Language | undefined;
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};
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static byID: Array<Language | undefined>;
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static add(lang: Language): void;
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static bySpec(lang: LangSpecs, context?: Context): Language[];
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abstract charset: StringEncoding;
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abstract doubleByteCharset: boolean;
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abstract englishName: string;
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abstract labels?: Labels;
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abstract languageID: number;
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abstract langTags: string[];
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abstract localizedName: string;
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toString(): string;
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}
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export default Language;
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export declare type LangSpec = string | number;
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export declare type LangSpecs = LangSpec | LangSpec[];
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export interface Localization {
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lang: LangSpecs;
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}
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declare namespace indexByLanguage {
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interface Options<T, U> {
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filter?(object: T): boolean;
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map?(object: T, lang: Language): U | undefined;
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onCollisions?(languageIDs: Set<number>): void;
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}
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}
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declare function indexByLanguage<T extends Localization>(objects: Iterable<T>, options?: indexByLanguage.Options<T, T> & {
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map?: never;
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}): Map<number, T>;
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declare function indexByLanguage<T extends Localization, U>(objects: Iterable<T>, options: indexByLanguage.Options<T, U> & {
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map(object: T, lang: Language): U;
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}): Map<number, Exclude<U, undefined>>;
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export { indexByLanguage };
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