How to use the geojs/annotation.rectangleAnnotation function in geojs

_.defaults(style, {
      fillColor: style.rgb,
      fillOpacity: 0.8,
      lineWidth: 2
    });

    if (type === 'point') {
      annotation_layer.addAnnotation(pointAnnotation({
        position: {
          x: coordinates[0],
          y: coordinates[1]
        },
        style
      }));
    } else if (type === 'rectangle') {
      annotation_layer.addAnnotation(rectangleAnnotation({
        corners: _.map(coordinates[0], (coords) => {
          return {
            x: coords[0],
            y: coords[1]
          };
        }),
        style
      }));
    } else if (type === 'polygon') {
      annotation_layer.addAnnotation(polygonAnnotation({
        vertices: _.map(coordinates[0], (coords) => {
          return {
            x: coords[0],
            y: coords[1]
          };
        }),