How to use the react-map-gl.LinearInterpolator function in react-map-gl

if (feature) {
      // calculate the bounding box of the feature
      const [minLng, minLat, maxLng, maxLat] = bbox(feature);
      // construct a viewport instance from the current state
      const viewport = new WebMercatorViewport(this.state.viewport);
      const {longitude, latitude, zoom} = viewport.fitBounds([[minLng, minLat], [maxLng, maxLat]], {
        padding: 40
      });

      this.setState({
        viewport: {
          ...this.state.viewport,
          longitude,
          latitude,
          zoom,
          transitionInterpolator: new LinearInterpolator({
            around: [event.offsetCenter.x, event.offsetCenter.y]
          }),
          transitionDuration: 1000
        }
      });
    }
  };