export interface TextDelta {
    text: string;
    done?: boolean;
}
export declare class ThrottledTextStream {
    private readonly onDelta;
    private readonly intervalMs;
    private buffer;
    private last;
    private readonly maxBufferChars;
    constructor(onDelta: (delta: TextDelta) => void, intervalMs?: number, maxBufferChars?: number);
    push(text: string): void;
    flush(done?: boolean): void;
}