/**
 * Custom React hook to attach a click listener to CometChat message indicators
 * inside an iframe. The callback will trigger when a user clicks on
 * a `.cometchat-message-list__message-indicator` element or any of its child buttons.
 *
 * This hook works for indicators and buttons that exist at the time the iframe is loaded.
 * It uses the capture phase to ensure clicks are caught even if internal CometChat
 * handlers stop propagation.
 *
 * @param {() => void} callback - Function to be called when a message indicator is clicked.
 *
 * @example
 * useMessageIndicatorClick(() => {
 *   console.log("A message indicator was clicked!");
 * });
 */
export declare function useMessageIndicatorClick(callback: () => void): void;