InfoBubble cannot display

        infoBubble2 = new InfoBubble({
          map: map,
          content: '<div class="phoneytext">Some label</div>',
          position: new google.maps.LatLng(-35, 151),
          shadowStyle: 1,
          padding: 0,
          backgroundColor: 'rgb(57,57,57)',
          borderRadius: 4,
          arrowSize: 10,
          borderWidth: 1,
          borderColor: '#2c2c2c',
          disableAutoPan: true,
          hideCloseButton: true,
          arrowPosition: 30,
          backgroundClassName: 'phoney',
          arrowStyle: 2
        });