Google 지도에서 정사각형 모서리가 있는 사용자 정의 InfoWindows를 만드는 방법은 무엇입니까?

<code class="js">const infoBubble = new google.maps.InfoWindowBubble({
  maxWidth: 300, // Maximum width of the InfoWindow
  maxHeight: 200, // Maximum height of the InfoWindow
  arrowPosition: 50, // Offset of the arrow from the center of the InfoWindow
  padding: 10, // Padding around the content of the InfoWindow
  borderWidth: 1, // Border width around the InfoWindow
  borderColor: "#000000", // Border color of the InfoWindow
  backgroundColor: "#FFFFFF", // Background color of the InfoWindow
  hideCloseButton: true, // Hide the close button on the InfoWindow
  borderRadius: 0, // Set the border radius to 0 for square corners
});

// Attach the custom InfoWindow to a map marker
const marker = new google.maps.Marker({
  position: {
    lat: 0,
    lng: 0,
  },
  map,
});
marker.addListener("click", () => {
  infoBubble.setContent("This is a custom InfoWindow.");
  infoBubble.open(map, marker);
});</code>