/**
 * Splits text into sentence chunks. In this SDK it does no real splitting:
 * {@link SentenceChunker.chunk} returns `[text]` for non-empty input, `[]` otherwise.
 */
export declare class SentenceChunker {
    constructor(..._a: unknown[]);
    /** Returns `[text]` if `text` is non-empty, otherwise `[]`. */
    chunk(text: string): string[];
    /** Alias for {@link SentenceChunker.chunk}. */
    call(text: string): string[];
}
/** Async-iterable stream of sentence chunks. In this SDK it yields nothing. */
export declare class SentenceChunkStream {
    constructor(..._a: unknown[]);
    [Symbol.asyncIterator](): AsyncGenerator<string>;
}
/** Buffered variant of {@link SentenceChunkStream}. Behaves identically here. */
export declare class BufferedSentenceChunkStream extends SentenceChunkStream {
}
/** Basic {@link SentenceChunker} variant. Behaves identically here. */
export declare class BasicSentenceChunker extends SentenceChunker {
}
/** Indic-language {@link SentenceChunker} variant. Behaves identically here. */
export declare class IndicSentenceChunker extends SentenceChunker {
}
/** Transliterates Indic scripts. In this SDK {@link IndicScriptTransliterator.transliterate} returns text unchanged. */
export declare class IndicScriptTransliterator {
    constructor(..._a: unknown[]);
    /** Returns `text` unchanged. */
    transliterate(text: string, _targetScript?: string): string;
}
/** Filters/normalizes text before synthesis. In this SDK {@link TextFilter.filter} returns text unchanged. */
export declare class TextFilter {
    constructor(..._a: unknown[]);
    /** Returns `text` unchanged. */
    filter(text: string): string;
    /** Alias for {@link TextFilter.filter}. */
    call(text: string): string;
}
/** Basic {@link TextFilter} variant. Behaves identically here. */
export declare class BasicTextFilter extends TextFilter {
}
/** Hyphenates English words. In this SDK {@link EnglishHyphenator.hyphenate} returns the word unchanged. */
export declare class EnglishHyphenator {
    constructor(..._a: unknown[]);
    /** Returns `word` unchanged. */
    hyphenate(word: string): string;
}
/** Hyphenate an English word. In this SDK it returns the word unchanged. */
export declare function hyphenateEnglish(word: string): string;
/** Detect the script of `text`. In this SDK it always returns `'latin'`. */
export declare function detectScript(_text: string): string;
/** Normalize a language code to its lowercase primary subtag (e.g. `'en-US'` -> `'en'`). Defaults to `'en'`. */
export declare function normalizeLangCode(code?: string | null): string;
/** Pre-warm the tokenizer. No-op in this SDK. */
export declare function preWarmTokenizer(..._a: unknown[]): void;
/** ISO codes of the Indic languages recognized by the text helpers. */
export declare const INDIC_LANGS: readonly string[];