import { ChatMessageBase, ChatMessageBurst } from './chatBurst.types';
/**
 * Agrupa mensajes consecutivos del mismo remitente en ráfagas.
 *
 * @example
 * ```ts
 * const bursts = groupMessagesBySender([
 *   { id: "a1", senderId: "ana", text: "Hola" },
 *   { id: "a2", senderId: "ana", text: "¿Tenés un minuto?" },
 *   { id: "b1", senderId: "bob", text: "Sí" },
 * ]);
 * // → 2 bursts: ana×2, bob×1
 * ```
 */
export declare function groupMessagesBySender<T extends ChatMessageBase>(messages: readonly T[], options?: {
    getBurstKey?: (burst: {
        senderId: string;
        firstMessage: T;
    }) => string;
}): ChatMessageBurst<T>[];