function addEventHandler(state, eventName, eventHandler) {
  if (Array.isArray(eventName)) {
    for (const singleEventName of eventName) {
      addEventHandler(state, singleEventName, eventHandler);
    }
    return;
  }
  if (!state.eventHandlers[eventName]) {
    state.eventHandlers[eventName] = [];
  }
  state.eventHandlers[eventName].push(eventHandler);
}
export {
  addEventHandler
};