How to use the @mapbox/mapbox-gl-draw/src/constants.types function in @mapbox/mapbox-gl-draw

const polygon = this.newFeature({
        type: Constants.geojsonTypes.FEATURE,
        properties: {},
        geometry: {
            type: Constants.geojsonTypes.POLYGON,
            coordinates: [[]]
        }
    });

    this.addFeature(polygon);

    this.clearSelectedFeatures();
    doubleClickZoom.disable(this);
    dragPan.disable(this);
    this.updateUIClasses({ mouse: Constants.cursors.ADD });
    this.activateUIButton(Constants.types.POLYGON);
    this.setActionableState({
        trash: true
    });

    return {
        polygon,
        currentVertexPosition: 0,
        dragMoving: false
    };
};

properties: {
      isCircle: true,
      center: []
    },
    geometry: {
      type: Constants.geojsonTypes.POLYGON,
      coordinates: [[]]
    }
  });

  this.addFeature(polygon);

  this.clearSelectedFeatures();
  doubleClickZoom.disable(this);
  this.updateUIClasses({ mouse: Constants.cursors.ADD });
  this.activateUIButton(Constants.types.POLYGON);
  this.setActionableState({
    trash: true
  });

  return {
    initialRadiusInKm: opts.initialRadiusInKm || DEFAULT_RADIUS_IN_KM,
    polygon,
    currentVertexPosition: 0
  };
};