export declare class MessageBuffer {
    private byteLength;
    private bytes;
    private requestId;
    constructor(command: number, requestId?: number);
    getRequestId(): number;
    setUint8(value: number): void;
    setUint16(value: number): void;
    setUint32(value: number): void;
    fill(message: string): void;
    fillUTF8(message: string): void;
    concat(buffer: Uint8Array): ArrayBuffer;
    get(): ArrayBuffer;
}