/**
 * Responsible for parsing the stream of const from the eye tracking file to chunks of text.
 *
 * The stream is decoded using a TextDecoderStream.
 * File is assumed to be always complete, there is no need to check for end of file.
 */
export declare class EyeParser {
    readonly rs: ReadableStream;
    readonly reader: ReadableStreamDefaultReader<string>;
    isDone: boolean;
    constructor(rs: ReadableStream, decoder?: TextDecoderStream);
    /**
     * Parses one chunk of text from the stream.
     * @returns {Promise<string>} The chunk of text.
     * @throws {Error} If the parser is done.
     */
    getTextChunk(): Promise<string>;
}