How to use the devextreme/data/data_source function in devextreme

getImages() {
      return new DataSource({
          store: images
      });
  }
}

getProducts() {
        return new DataSource({
          store: products,
          group: 'Category'
      });
    }

constructor(props: any) {
        super(props);
        this.state = {
            text: "",
            items
        };

        this.dataSource = new DataSource(
            {
                store: {
                    type: "array",
                    data: items
                },
                sort: [
                    { getter: "text", desc: true}
                ],
                pageSize: 1
            }
        );

        this.updateText = this.updateText.bind(this);
        this.addTextToList = this.addTextToList.bind(this);
    }

.then(json => {
                this.jobDatasource = new DataSource({
                    store: json['hydra:member']
                })
            })
            .catch(error => {

getPlainProducts() {
    return new DataSource({
      store: products.slice(0, 4)
    });
  }