How to use the react-viro.ViroMaterials.createMaterials function in react-viro

} else {
        this.props.sceneNavigator.push(sceneKey, {scene:scene, passProps:{title:sceneKey}});
      }
    }
  }
});

const styles = StyleSheet.create({
   centeredText: {
        fontSize: 30,
        fontFamily: 'Arial',
        color: '#ffffff',
   }
});

ViroMaterials.createMaterials({
  blue: {
    shininess: 2.0,
    lightingModel: "Lambert",
    diffuseColor: "#0000ff"
  },
  black: {
    shininess: 2.0,
    lightingModel: "Lambert",
    diffuseColor: "#000000"
  },
  red: {
    shininess: 2.0,
    lightingModel: "Lambert",
    diffuseColor: "#ff0000"
  },
  box_texture: {

_onObjectLoadStart(index) {
        return () => {
          this.props.onLoadCallback(index, LoadConstants.LOADING);
        };
    },

    _onObjectLoadEnd(index) {
        return () => {
          this.props.onLoadCallback(index, LoadConstants.LOADED);
          //this.props.arSceneNavigator.viroAppProps.loadingObjectCallback(index, LoadingConstants.LOADED);
        };
    },
});

ViroMaterials.createMaterials({
  transparentFloor: {
    diffuseColor: "#ff000000",
  },
  porsche: {
    diffuseTexture: require("../res/car_porsche/Porsche911turboS_diff.jpg"),
  },
  bball: {
    diffuseTexture: require("../res/bball/bball.jpg"),
  },
  ring: {
    diffuseTexture: require("../res/portal_ring/portal_ring.png"),
  },
  tesla: {
    shininess: 1.0,
    lightingModel:"Blinn",
  },

backgroundColor: '#FFFFFF',
  },
  welcome: {
    fontSize: 20,
    textAlign: 'center',
    color: '#333333',
    margin: 10,
  },
  instructions: {
    textAlign: 'center',
    color: '#333333',
    marginBottom: 5,
  },
});

ViroMaterials.createMaterials({
  blue: {
    shininess: 2.0,
    lightingModel: "Lambert",
    diffuseColor: "#0000ff"
  },
  black: {
    shininess: 2.0,
    lightingModel: "Lambert",
    diffuseColor: "#000000"
  },
  red: {
    shininess: 2.0,
    lightingModel: "Lambert",
    diffuseColor: "#ff0000"
  },
  wework_title: {

if (currentVideo + 1 < videos.length){
      this.setState({
        videoIndex: (currentVideo + 1),
        videoPaused: false
      });
    }
  },

});

ViroAnimations.registerAnimations({
  fadeOut:{properties:{opacity: 0.0}, duration: 500},
  fadeIn:{properties:{opacity: 1.0}, duration: 500},
});

ViroMaterials.createMaterials({
  opaqueWhite: {
    shininess: 2.0,
    lightingModel: "Lambert",
    diffuseColor: "#FFFFFF"
  },
});

module.exports = ViroTheatre;

snowRate={1.0}
        fallSpeed={1.0}
        windShear={1.0} />
    );
  },
});

var styles = StyleSheet.create({
  helloWorldTextStyle: {
    fontFamily: 'HelveticaNeue-Medium',
    fontSize: 40,
    color: '#ffffff',
  },
});

ViroMaterials.createMaterials({
  ground:{
    cullMode: "None",
    shininess: 2.0,
    diffuseColor: "#ff9999",
    lightingModel: "Blinn",
  }
 });
module.exports = ViroParticleTemplates;